-handle_p 1 and pass the db handle.
+
+ @return The driverkey for use in db_* API switch statements.
+
+ @author Andrew Piskorski (atp@piskorski.com)
+ @creation-date 2003/04/08
+} {
+ set proc_name {db_driverkey}
+
+ if { $handle_p } {
+ set handle $dbn ; set dbn {}
+ set pool [ns_db poolname $handle]
+
+ if { [nsv_exists {db_pool_to_dbn} $pool] } {
+ set dbn [nsv_get {db_pool_to_dbn} $pool]
+ } else {
+ # db_pool_to_dbn_init runs on startup, so other than some
+ # broken code deleting the nsv key (very unlikely), the
+ # only way this could happen is for someone to call this
+ # proc with a db handle from a pool which is not part of
+ # any dbn.
+
+ error "No database name (dbn) found for pool '$pool'. Check the 'ns/server/[ns_info server]/acs/database' section of your config file."
+ }
+ }
+
+ if { ![nsv_exists {db_driverkey} $dbn] } {
+ # This ASSUMES that any overriding of this default value via
+ # "ns_param driverkey_dbn" has already been done:
+
+ if { $handle_p } {
+ set driver [ns_db driver $handle]
+ } else {
+ db_with_handle -dbn $dbn handle {
+ set driver [ns_db driver $handle]
+ }
+ }
+
+ # These are the default driverkey values, if they are not set
+ # in the config file:
+
+ if { [string equal $driver {Oracle8}] } {
+ set driverkey {oracle}
+ } elseif { [string equal $driver {PostgreSQL}] } {
+ set driverkey {postgresql}
+ } elseif { [string equal $driver {ODBC}] } {
+ set driverkey {nsodbc}
+ } else {
+ set driverkey {}
+ ns_log Error "$proc_name: Unknown driver '$driver_type'."
+ }
+
+ nsv_set {db_driverkey} $dbn $driverkey
+ }
+
+ return [nsv_get {db_driverkey} $dbn]
+}
+
+
proc_doc db_type { } {
Returns the RDBMS type (i.e. oracle, postgresql) this OpenACS installation is
using. The nsv ad_database_type is set up during the bootstrap process.
@@ -225,6 +336,12 @@
return [nsv_get ad_known_database_types .]
}
+
+# db_null, db_quote, db_nullify_empty_string - were all previously
+# defined Oracle only, no Postgres equivalent existed at all. So, it
+# can't hurt anything to have them defined in when OpenACS is using
+# Postgres too. --atp@piskorski.com, 2003/04/08 05:34 EDT
+
proc_doc db_null { } {
Returns an empty string, which Oracle thinks is null. This routine was
invented to provide an RDBMS-specific null value but doesn't actually
@@ -239,7 +356,74 @@
return $result
}
+ad_proc -public db_nullify_empty_string { string } {
+ A convenience function that returns [db_null] if $string is the empty string.
+} {
+ if { [empty_string_p $string] } {
+ return [db_null]
+ } else {
+ return $string
+ }
+}
+
+ad_proc db_nextval {{ -dbn "" } sequence } {
+
+ Returns the next value for a sequence. This can utilize a pool of
+ sequence values.
+
+ + Example: + +
+ set new_object_id [db_nextval acs_object_id_seq] ++ + @param sequence the name of an sql sequence + + @param dbn The database name to use. If empty_string, uses the default database. + + @see /doc/db-api-detailed.html +} { + set driverkey [db_driverkey $dbn] + + # PostgreSQL has a special implementation here, any other db will + # probably work with the default: + + switch $driverkey { + + postgresql { + # the following query will return a nextval if the sequnce + # is of relkind = 'S' (a sequnce). if it is not of relkind = 'S' + # we will try querying it as a view: + + if { [db_0or1row -dbn $dbn nextval_sequence " + select nextval('${sequence}') as nextval + where (select relkind + from pg_class + where relname = '${sequence}') = 'S' + "]} { + return $nextval + } else { + ns_log debug "db_nextval: sequence($sequence) is not a real sequence. perhaps it uses the view hack." + db_0or1row -dbn $dbn nextval_view "select nextval from ${sequence}" + return $nextval + } + + } + + oracle - + nsodbc - + default { + return [db_string -dbn $dbn "nextval" "select $sequence.nextval from dual"] + } + } + + + +} + + ad_proc db_nth_pool_name {{ -dbn "" } n } { Returns the name of the pool used for the nth-nested selection (0-relative). @@ -248,9 +432,9 @@ set available_pools [db_available_pools -dbn $dbn] if { $n < [llength $available_pools] } { - set pool [lindex $available_pools $n] + set pool [lindex $available_pools $n] } else { - return -code error "Ran out of database pools ($available_pools)" + return -code error "Ran out of database pools ($available_pools)" } return $pool } @@ -267,23 +451,23 @@ # Initialize bookkeeping variables. if { ![info exists db_state(handles)] } { - set db_state(handles) [list] + set db_state(handles) [list] } if { ![info exists db_state(n_handles_used)] } { - set db_state(n_handles_used) 0 + set db_state(n_handles_used) 0 } if { $db_state(n_handles_used) >= [llength $db_state(handles)] } { - set pool [db_nth_pool_name -dbn $dbn $db_state(n_handles_used)] - set start_time [clock clicks] - set errno [catch { - set db [ns_db gethandle $pool] - } error] - ad_call_proc_if_exists ds_collect_db_call $db gethandle "" $pool $start_time $errno $error - lappend db_state(handles) $db - if { $errno } { - global errorInfo errorCode - return -code $errno -errorcode $errorCode -errorinfo $errorInfo $error - } + set pool [db_nth_pool_name -dbn $dbn $db_state(n_handles_used)] + set start_time [clock clicks] + set errno [catch { + set db [ns_db gethandle $pool] + } error] + ad_call_proc_if_exists ds_collect_db_call $db gethandle "" $pool $start_time $errno $error + lappend db_state(handles) $db + if { $errno } { + global errorInfo errorCode + return -code $errno -errorcode $errorCode -errorinfo $errorInfo $error + } } set my_dbh [lindex $db_state(handles) $db_state(n_handles_used)] set dbh $my_dbh @@ -298,7 +482,7 @@ # Unset dbh, so any subsequence use of this variable will bomb. if { [info exists dbh] } { - unset dbh + unset dbh } @@ -307,22 +491,375 @@ # errno = 3 or 4 give undefined results if { $errno == 1 } { - - # A real error occurred - global errorInfo errorCode - return -code $errno -errorcode $errorCode -errorinfo $errorInfo $error + + # A real error occurred + global errorInfo errorCode + return -code $errno -errorcode $errorCode -errorinfo $errorInfo $error } if { $errno == 2 } { - - # The code block called a "return", so pass the message through but don't try - # to return errorCode or errorInfo since they may not exist - - return -code $errno $error + + # The code block called a "return", so pass the message through but don't try + # to return errorCode or errorInfo since they may not exist + + return -code $errno $error } } +ad_proc -public db_exec_plsql {{ -dbn "" } statement_name sql args } { + + Oracle: + Executes a PL/SQL statement, and returns the variable of bind + variable
:1.
+
+ + PostgreSQL: + Performs a pl/pgsql function or procedure call. The caller must + perform a select query that returns the value of the function. + +
+ Examples: + +
+
+ # Oracle:
+ db_exec_plsql delete_note {
+ begin note.delete(:note_id); end;
+ }
+
+ # PostgreSQL:
+ db_exec_plsql delete_note {
+ select note__delete(:note_id);
+ }
+
+
+ + If you need the return value, then do something like this: + +
+
+ # Oracle:
+ set new_note_id [db_exec_plsql create_note {
+ begin
+ :1 := note.new(
+ owner_id => :user_id,
+ title => :title,
+ body => :body,
+ creation_user => :user_id,
+ creation_ip => :peeraddr,
+ context_id => :package_id
+ );
+ end;
+ }]
+
+ # PostgreSQL:
+ set new_note_id [db_exec_plsql create_note {
+ select note__new(
+ null,
+ :user_id,
+ :title,
+ :body,
+ 'note',
+ now(),
+ :user_id,
+ :peeraddr,
+ :package_id
+ );
+ }]
+
+
+ + You can call several pl/sql statements at once, like this: + +
+
+ # Oracle:
+ db_exec_plsql delete_note {
+ begin
+ note.delete(:note_id);
+ note.delete(:another_note_id);
+ note.delete(:yet_another_note_id);
+ end;
+ }
+
+ # PostgreSQL:
+ db_exec_plsql delete_note {
+ select note__delete(:note_id);
+ select note__delete(:another_note_id);
+ select note__delete(:yet_another_note_id);
+ }
+
+
+ If you are using xql files then put the body of the query in a
+ yourfilename-oracle.xql or yourfilename-postgresql.xql file, as appropriate. E.g. the first example
+ transformed to use xql files looks like this:
+
+
+
+ yourfilename.tcl:
+
+
+ db_exec_plsql delete_note { }
+
+
+ yourfilename-oracle.xql:
+
+
+ <fullquery name="delete_note"> + <querytext> + begin + note.delete(:note_id); + end; + </querytext> + </fullquery>+ +
+ yourfilename-postgresql.xql:
+
+
+ <fullquery name="delete_note"> + <querytext> + select note__delete(:note_id); + </querytext> + </fullquery>+ + + @param dbn The database name to use. If empty_string, uses the default database. + + @see /doc/db-api-detailed.html +} { + ad_arg_parser { bind_output bind } $args + + # Query Dispatcher (OpenACS - ben) + set full_statement_name [db_qd_get_fullname $statement_name] + + if { [info exists bind_output] } { + return -code error "the -bind_output switch is not currently supported" + } + + set driverkey [db_driverkey $dbn] + switch $driverkey { + postgresql { + set postgres_p 1 + } + + oracle - + nsodbc - + default { + set postgres_p 0 + } + } + + if { ! $postgres_p } { + db_with_handle -dbn $dbn db { + # Right now, use :1 as the output value if it occurs in the statement, + # or not otherwise. + set test_sql [db_qd_replace_sql $full_statement_name $sql] + if { [regexp {:1} $test_sql] } { + return [db_exec exec_plsql_bind $db $full_statement_name $sql 2 1 ""] + } else { + return [db_exec dml $db $full_statement_name $sql] + } + } + } else { + # Postgres doesn't have PL/SQL, of course, but it does have + # PL/pgSQL and other procedural languages. Rather than assign the + # result to a bind variable which is then returned to the caller, + # the Postgres version of OpenACS requires the caller to perform a + # select query that returns the value of the function. + + # We are no longer calling db_string, which screws up the bind + # variable stuff otherwise because of calling environments. (ben) + + ad_arg_parser { bind_output bind } $args + + # I'm not happy about having to get the fullname here, but right now + # I can't figure out a cleaner way to do it. I will have to + # revisit this ASAP. (ben) + set full_statement_name [db_qd_get_fullname $statement_name] + + if { [info exists bind_output] } { + return -code error "the -bind_output switch is not currently supported" + } + + db_with_handle -dbn $dbn db { + # plsql calls that are simple selects bypass the plpgsql + # mechanism for creating anonymous functions (OpenACS - Dan). + # if a table is being created, we need to bypass things, too (OpenACS - Ben). + set test_sql [db_qd_replace_sql $full_statement_name $sql] + if {[regexp -nocase -- {^\s*select} $test_sql match]} { + db_qd_log QDDebug "PLPGSQL: bypassed anon function" + set selection [db_exec 0or1row $db $full_statement_name $sql] + } elseif {[regexp -nocase -- {^\s*create table} $test_sql match] || [regexp -nocase -- {^\s*drop table} $test_sql match]} { + db_qd_log QDDebug "PLPGSQL: bypassed anon function -- create/drop table" + set selection [db_exec dml $db $full_statement_name $sql] + return "" + } else { + db_qd_log QDDebug "PLPGSQL: using anonymous function" + set selection [db_exec_plpgsql $db $full_statement_name $sql \ + $statement_name] + } + return [ns_set value $selection 0] + } + } +} + + +ad_proc -private db_exec_plpgsql { db statement_name pre_sql fname } { + + PostgreSQL only. +
+ + A helper procedure to execute a SQL statement, potentially binding + depending on the value of the $bind variable in the calling environment + (if set). + +
+ Low level replacement for db_exec which replaces inline code with a proc. + db proc is dropped after execution. This is a temporary fix until we can + port all of the db_exec_plsql calls to simple selects of the inline code + wrapped in function calls. + +
+ emulation of plsql calls from oracle. This routine takes the plsql + statements and wraps them in a function call, calls the function, and then + drops the function. Future work might involve converting this to cache the + function calls + +
+ This proc is private - use db_exec_plsql instead! + + @see db_exec_plsql + +} { + set start_time [clock clicks] + + db_qd_log QDDebug "PRE-QD: the SQL is $pre_sql" + + # Query Dispatcher (OpenACS - ben) + set sql [db_qd_replace_sql $statement_name $pre_sql] + + db_qd_log QDDebug "POST-QD: the SQL is $sql" + + set unique_id [db_nextval "anon_func_seq"] + + set function_name "__exec_${unique_id}_${fname}" + + # insert tcl variable values (Openacs - Dan) + if {![string equal $sql $pre_sql]} { + set sql [uplevel 2 [list subst -nobackslashes $sql]] + } + db_qd_log QDDebug "PLPGSQL: converted: $sql to: select $function_name ()" + + # create a function definition statement for the inline code + # binding is emulated in tcl. (OpenACS - Dan) + + set errno [catch { + upvar bind bind + if { [info exists bind] && [llength $bind] != 0 } { + if { [llength $bind] == 1 } { + set bind_vars [list] + set len [ns_set size $bind] + for {set i 0} {$i < $len} {incr i} { + lappend bind_vars [ns_set key $bind $i] \ + [ns_set value $bind $i] + } + set proc_sql [db_bind_var_substitution $sql $bind_vars] + } else { + set proc_sql [db_bind_var_substitution $sql $bind] + } + } else { + set proc_sql [uplevel 2 [list db_bind_var_substitution $sql]] + } + + ns_db dml $db "create function $function_name () returns varchar as ' + [DoubleApos $proc_sql] + ' language 'plpgsql'" + + set ret_val [ns_db 0or1row $db "select $function_name ()"] + # drop the anonymous function (OpenACS - Dan) + + # bartt: Wait a second to workaround a problem in PostgreSQL 7.3. + # The problem only occured here. Couldn't reproduce it elsewhere. + after 1000 {ns_db dml $db "drop function $function_name ()"} + + return $ret_val + + } error] + + global errorInfo errorCode + set errinfo $errorInfo + set errcode $errorCode + + ad_call_proc_if_exists ds_collect_db_call $db 0or1row $statement_name $sql $start_time $errno $error + + if { $errno == 2 } { + return $error + } else { + catch {ns_db dml $db "drop function $function_name ()"} + } + + return -code $errno -errorinfo $errinfo -errorcode $errcode $error +} + + +ad_proc -private db_bind_var_substitution { sql { bind "" } } { + + This proc emulates the bind variable substitution in the postgresql driver. + Since this is a temporary hack, we do it in tcl instead of hacking up the + driver to support plsql calls. This is only used for the db_exec_plpgsql + function. + +} { + if {[string equal $bind ""]} { + upvar __db_sql lsql + set lsql $sql + uplevel { + set __db_lst [regexp -inline -indices -all -- {:?:\w+} $__db_sql] + for {set __db_i [expr [llength $__db_lst] - 1]} {$__db_i >= 0} {incr __db_i -1} { + set __db_ws [lindex [lindex $__db_lst $__db_i] 0] + set __db_we [lindex [lindex $__db_lst $__db_i] 1] + set __db_bind_var [string range $__db_sql $__db_ws $__db_we] + if {![string match "::*" $__db_bind_var]} { + set __db_tcl_var [string range $__db_bind_var 1 end] + set __db_tcl_var [set $__db_tcl_var] + if {[string equal $__db_tcl_var ""]} { + set __db_tcl_var null + } else { + set __db_tcl_var "'[DoubleApos $__db_tcl_var]'" + } + set __db_sql [string replace $__db_sql $__db_ws $__db_we $__db_tcl_var] + } + } + } + } else { + + array set bind_vars $bind + + set lsql $sql + set lst [regexp -inline -indices -all -- {:?:\w+} $sql] + for {set i [expr [llength $lst] - 1]} {$i >= 0} {incr i -1} { + set ws [lindex [lindex $lst $i] 0] + set we [lindex [lindex $lst $i] 1] + set bind_var [string range $sql $ws $we] + if {![string match "::*" $bind_var]} { + set tcl_var [string range $bind_var 1 end] + set val $bind_vars($tcl_var) + if {[string equal $val ""]} { + set val null + } else { + set val "'[DoubleApos $val]'" + } + set lsql [string replace $lsql $ws $we $val] + } + } + } + + return $lsql +} + + ad_proc db_release_unused_handles {{ -dbn "" }} { Releases any database handles that are presently unused. @@ -332,25 +869,25 @@ upvar "#0" [db_state_array_name_is -dbn $dbn] db_state if { [info exists db_state(n_handles_used)] } { - # Examine the elements at the end of db_state(handles), killing off - # handles that are unused and not engaged in a transaction. + # Examine the elements at the end of db_state(handles), killing off + # handles that are unused and not engaged in a transaction. - set index_to_examine [expr { [llength $db_state(handles)] - 1 }] - while { $index_to_examine >= $db_state(n_handles_used) } { - set db [lindex $db_state(handles) $index_to_examine] + set index_to_examine [expr { [llength $db_state(handles)] - 1 }] + while { $index_to_examine >= $db_state(n_handles_used) } { + set db [lindex $db_state(handles) $index_to_examine] - # Stop now if the handle is part of a transaction. - if { [info exists db_state(transaction_level,$db)] && \ - $db_state(transaction_level,$db) > 0 } { - break - } + # Stop now if the handle is part of a transaction. + if { [info exists db_state(transaction_level,$db)] && \ + $db_state(transaction_level,$db) > 0 } { + break + } - set start_time [clock clicks] - ns_db releasehandle $db - ad_call_proc_if_exists ds_collect_db_call $db releasehandle "" "" $start_time 0 "" - incr index_to_examine -1 - } - set db_state(handles) [lrange $db_state(handles) 0 $index_to_examine] + set start_time [clock clicks] + ns_db releasehandle $db + ad_call_proc_if_exists ds_collect_db_call $db releasehandle "" "" $start_time 0 "" + incr index_to_examine -1 + } + set db_state(handles) [lrange $db_state(handles) 0 $index_to_examine] } } @@ -365,13 +902,128 @@ set errno [catch { return [ns_db getrow $db $selection] } error] ad_call_proc_if_exists ds_collect_db_call $db getrow "" "" $start_time $errno $error if { $errno == 2 } { - return $error + return $error } global errorInfo errorCode return -code $errno -errorinfo $errorInfo -errorcode $errorCode $error } +ad_proc -private db_exec { type db statement_name pre_sql {ulevel 2} args } { + + A helper procedure to execute a SQL statement, potentially binding + depending on the value of the $bind variable in the calling environment + (if set). + +} { + set start_time [clock clicks] + set driverkey [db_driverkey -handle_p 1 $db] + + # Note: Although marked as private, db_exec is in fact called + # extensively from several other packages. We DEFINITELY don't + # want to have to change all those procs to pass in the + # (redundant) $dbn just so we can use it in the call to + # db_driverkey, so db_driverkey MUST support its -handle switch. + # --atp@piskorski.com, 2003/04/09 12:13 EDT + + db_qd_log QDDebug "PRE-QD: the SQL is $pre_sql for $statement_name" + + # Query Dispatcher (OpenACS - ben) + set sql [db_qd_replace_sql $statement_name $pre_sql] + + # insert tcl variable values (Openacs - Dan) + if {![string equal $sql $pre_sql]} { + set sql [uplevel $ulevel [list subst -nobackslashes $sql]] + } + + db_qd_log QDDebug "POST-QD: the SQL is $sql" + + set errno [catch { + upvar bind bind + + if { [info exists bind] && [llength $bind] != 0 } { + if { [llength $bind] == 1 } { + # $bind is an ns_set id: + + switch $driverkey { + oracle { + return [eval [list ns_ora $type $db -bind $bind $sql] $args] + } + postgresql { + return [eval [list ns_pg_bind $type $db -bind $bind $sql]] + } + nsodbc { + return [eval [list ns_odbc_bind $type $db -bind $bind $sql]] + } + default { + error "Unknown database driver. Bind variables not supported for this database." + } + } + + } else { + # $bind is a Tcl list, convert it to an ns_set: + set bind_vars [ns_set create] + foreach { name value } $bind { + ns_set put $bind_vars $name $value + } + } + + switch $driverkey { + oracle { + # TODO: Using $args outside the list is + # potentially bad here, depending on what is in + # args and if the items contain any embedded + # whitespace. Or maybe it works fine. But it's + # hard to know. Document or fix. + # --atp@piskorski.com, 2003/04/09 15:33 EDT + + return [eval [list ns_ora $type $db -bind $bind_vars $sql] $args] + } + postgresql { + return [eval [list ns_pg_bind $type $db -bind $bind_vars $sql]] + } + nsodbc { + return [eval [list ns_odbc_bind $type $db -bind $bind_vars $sql]] + } + default { + error "Unknown database driver. Bind variables not supported for this database." + } + } + + } else { + # Bind variables, if any, are defined solely as individual + # Tcl variables: + + switch $driverkey { + oracle { + return [uplevel $ulevel [list ns_ora $type $db $sql] $args] + } + postgresql { + return [uplevel $ulevel [list ns_pg_bind $type $db $sql]] + } + nsodbc { + return [uplevel $ulevel [list ns_odbc_bind $type $db $sql]] + } + default { + # Using plain ns_db like this will work ONLY if + # the query is NOT using bind variables: + # --atp@piskorski.com, 2001/09/03 08:41 EDT + return [uplevel $ulevel [list ns_db $type $db $sql] $args] + } + } + } + } error] + + ad_call_proc_if_exists ds_collect_db_call $db $type $statement_name $sql $start_time $errno $error + if { $errno == 2 } { + return $error + } + + global errorInfo errorCode + return -code $errno -errorinfo $errorInfo -errorcode $errorCode $error +} + + ad_proc db_string {{ -dbn "" } statement_name sql args } { Usage: db_string statement-name sql [ -default default ] [ -bind bind_set_id | -bind bind_value_list ] @@ -387,14 +1039,14 @@ ad_arg_parser { default bind } $args db_with_handle -dbn $dbn db { - set selection [db_exec 0or1row $db $full_name $sql] + set selection [db_exec 0or1row $db $full_name $sql] } if { [empty_string_p $selection] } { - if { [info exists default] } { - return $default - } - return -code error "Selection did not return a value, and no default was provided" + if { [info exists default] } { + return $default + } + return -code error "Selection did not return a value, and no default was provided" } return [ns_set value $selection 0] } @@ -416,11 +1068,11 @@ # Can't use db_foreach here, since we need to use the ns_set directly. db_with_handle -dbn $dbn db { - set selection [db_exec select $db $full_statement_name $sql] - set result [list] - while { [db_getrow $db $selection] } { - lappend result [ns_set value $selection 0] - } + set selection [db_exec select $db $full_statement_name $sql] + set result [list] + while { [db_getrow $db $selection] } { + lappend result [ns_set value $selection 0] + } } return $result } @@ -444,17 +1096,17 @@ # Can't use db_foreach here, since we need to use the ns_set directly. db_with_handle -dbn $dbn db { - set selection [db_exec select $db $full_statement_name $sql] + set selection [db_exec select $db $full_statement_name $sql] - set result [list] + set result [list] - while { [db_getrow $db $selection] } { - set this_result [list] - for { set i 0 } { $i < [ns_set size $selection] } { incr i } { - lappend this_result [ns_set value $selection $i] - } - lappend result $this_result - } + while { [db_getrow $db $selection] } { + set this_result [list] + for { set i 0 } { $i < [ns_set size $selection] } { incr i } { + lappend this_result [ns_set value $selection $i] + } + lappend result $this_result + } } return $result } @@ -502,7 +1154,7 @@
db_foreach statement-name sql [ -bind bind_set_id | -bind bind_value_list ] \ [ -column_array array_name | -column_set set_name ] \ - code_block [ if_no_rows if_no_rows_block ] + code_block [ if_no_rows if_no_rows_block ]@@ -515,10 +1167,10 @@
Example:
db_foreach greeble_query "select foo, bar from greeble" {
- ns_write "<li>foo=$foo; bar=$bar\n"
+ ns_write "<li>foo=$foo; bar=$bar\n"
} if_no_rows {
- # This block is optional.
- ns_write "<li>No greebles!\n"
+ # This block is optional.
+ ns_write "<li>No greebles!\n"
}db_multirow [ -local ] [ -upvar_level n_levels_up ] [ -append ] [ -extend column_list ] \ var-name statement-name sql [ -bind bind_set_id | -bind bind_value_list ] \ - code_block [ if_no_rows if_no_rows_block ] + code_block [ if_no_rows if_no_rows_block ]@@ -717,35 +1369,35 @@ # Do some syntax checking. set arglength [llength $args] if { $arglength == 0 } { - # No code block. - set code_block "" + # No code block. + set code_block "" } elseif { $arglength == 1 } { - # Have only a code block. - set code_block [lindex $args 0] + # Have only a code block. + set code_block [lindex $args 0] } elseif { $arglength == 3 } { - # Should have code block + if_no_rows + code block. - if { ![string equal [lindex $args 1] "if_no_rows"] \ - && ![string equal [lindex $args 1] "else"] } { - return -code error "Expected if_no_rows as second-to-last argument" - } - set code_block [lindex $args 0] - set if_no_rows_code_block [lindex $args 2] + # Should have code block + if_no_rows + code block. + if { ![string equal [lindex $args 1] "if_no_rows"] \ + && ![string equal [lindex $args 1] "else"] } { + return -code error "Expected if_no_rows as second-to-last argument" + } + set code_block [lindex $args 0] + set if_no_rows_code_block [lindex $args 2] } else { - return -code error "Expected 1 or 3 arguments after switches" + return -code error "Expected 1 or 3 arguments after switches" } upvar $level_up "$var_name:rowcount" counter upvar $level_up "$var_name:columns" columns if { !$append_p || ![info exists counter]} { - set counter 0 + set counter 0 } db_with_handle -dbn $dbn db { - set selection [db_exec select $db $full_statement_name $sql] + set selection [db_exec select $db $full_statement_name $sql] set local_counter 0 - while { [db_getrow $db $selection] } { + while { [db_getrow $db $selection] } { if { $local_counter == 0 } { for { set i 0 } { $i < [ns_set size $selection] } { incr i } { @@ -765,86 +1417,222 @@ } } - if { [empty_string_p $code_block] } { - # No code block - pull values directly into the var_name array. - upvar $level_up "$var_name:[expr {$counter+1}]" array_val - for { set i 0 } { $i < [ns_set size $selection] } { incr i } { - set array_val([ns_set key $selection $i]) \ - [ns_set value $selection $i] - } - } else { - # Pull values from the query into local variables - for { set i 0 } { $i < [ns_set size $selection] } { incr i } { - upvar 1 [ns_set key $selection $i] column_value - set column_value [ns_set value $selection $i] - } + if { [empty_string_p $code_block] } { + # No code block - pull values directly into the var_name array. + upvar $level_up "$var_name:[expr {$counter+1}]" array_val + for { set i 0 } { $i < [ns_set size $selection] } { incr i } { + set array_val([ns_set key $selection $i]) \ + [ns_set value $selection $i] + } + } else { + # Pull values from the query into local variables + for { set i 0 } { $i < [ns_set size $selection] } { incr i } { + upvar 1 [ns_set key $selection $i] column_value + set column_value [ns_set value $selection $i] + } # Initialize the "extend" columns to the empty string foreach column_name $extend { - upvar 1 $column_name column_value - set column_value "" + upvar 1 $column_name column_value + set column_value "" } # Execute the code block - set errno [catch { uplevel 1 $code_block } error] + set errno [catch { uplevel 1 $code_block } error] - # Handle or propagate the error. Can't use the usual - # "return -code $errno..." trick due to the db_with_handle - # wrapped around this loop, so propagate it explicitly. - switch $errno { - 0 { - # TCL_OK - } - 1 { - # TCL_ERROR - global errorInfo errorCode - error $error $errorInfo $errorCode - } - 2 { - # TCL_RETURN - error "Cannot return from inside a db_multirow loop" - } - 3 { - # TCL_BREAK - ns_db flush $db - break - } - 4 { - # TCL_CONTINUE - continue - } - default { - error "Unknown return code: $errno" - } - } + # Handle or propagate the error. Can't use the usual + # "return -code $errno..." trick due to the db_with_handle + # wrapped around this loop, so propagate it explicitly. + switch $errno { + 0 { + # TCL_OK + } + 1 { + # TCL_ERROR + global errorInfo errorCode + error $error $errorInfo $errorCode + } + 2 { + # TCL_RETURN + error "Cannot return from inside a db_multirow loop" + } + 3 { + # TCL_BREAK + ns_db flush $db + break + } + 4 { + # TCL_CONTINUE + continue + } + default { + error "Unknown return code: $errno" + } + } - # Pull the local variables back out and into the array. - upvar $level_up "$var_name:[expr {$counter + 1}]" array_val - foreach column_name $columns { - upvar 1 $column_name column_value - set array_val($column_name) $column_value - } - } - incr counter + # Pull the local variables back out and into the array. + upvar $level_up "$var_name:[expr {$counter + 1}]" array_val + foreach column_name $columns { + upvar 1 $column_name column_value + set array_val($column_name) $column_value + } + } + incr counter incr local_counter - set array_val(rownum) $counter - } + set array_val(rownum) $counter + } } # If the if_no_rows_code is defined, go ahead and run it. if { $counter == 0 && [info exists if_no_rows_code_block] } { - uplevel 1 $if_no_rows_code_block + uplevel 1 $if_no_rows_code_block } } +ad_proc -public db_dml {{ -dbn "" } statement_name sql args } { + Do a DML statement. + + @param dbn The database name to use. If empty_string, uses the default database. + + @see /doc/db-api-detailed.html +} { + ad_arg_parser { clobs blobs clob_files blob_files bind } $args + set driverkey [db_driverkey $dbn] + + switch $driverkey { + postgresql { + set postgres_p 1 + } + oracle - + nsodbc - + default { + set postgres_p 0 + } + } + + # Query Dispatcher (OpenACS - ben) + set full_statement_name [db_qd_get_fullname $statement_name] + + # This "only one of..." check didn't exist in the PostgreSQL + # version, but it shouldn't't hurt anything: --atp@piskorski.com, + # 2003/04/08 06:19 EDT + + # Only one of clobs, blobs, clob_files, and blob_files is allowed. + # Remember which one (if any) is provided: + + set lob_argc 0 + set lob_argv [list] + set command "dml" + if { [info exists clobs] } { + set command "clob_dml" + set lob_argv $clobs + incr lob_argc + } + if { [info exists blobs] } { + set command "blob_dml" + set lob_argv $blobs + incr lob_argc + } + if { [info exists clob_files] } { + set command "clob_dml_file" + set lob_argv $clob_files + incr lob_argc + } + if { [info exists blob_files] } { + set command "blob_dml_file" + set lob_argv $blob_files + incr lob_argc + } + if { $lob_argc > 1 } { + error "Only one of -clobs, -blobs, -clob_files, or -blob_files may be specified as an argument to db_dml" + } + + if { ! $postgres_p } { + # Oracle: + db_with_handle -dbn $dbn db { + if { $lob_argc == 1 } { + # Bind :1, :2, ..., :n as LOBs (where n = [llength $lob_argv]) + set bind_vars [list] + for { set i 1 } { $i <= [llength $lob_argv] } { incr i } { + lappend bind_vars $i + } + eval [list db_exec "${command}_bind" $db $full_statement_name $sql 2 $bind_vars] $lob_argv + } else { + eval [list db_exec $command $db $full_statement_name $sql] $lob_argv + } + } + + } elseif { [string equal $command "blob_dml_file"] } { + # PostgreSQL: + db_with_handle db { + # another ugly hack to avoid munging tcl files. + # __lob_id needs to be set inside of a query (.xql) file for this + # to work. Say for example that you need to create a lob. In + # Oracle, you would do something like: + + # db_dml update_photo "update foo set bar = empty_blob() + # where bar = :bar + # returning foo into :1" -blob_files [list $file] + # for postgresql we can do the equivalent by placing the following + # in a query file: + # update foo set bar = [set __lob_id [db_string get_id "select empty_lob()"]] + # where bar = :bar + + # __lob_id acts as a flag that signals that blob_dml_file is + # required, and it is also used to pass along the lob_id. It + # is unsert afterwards to avoid name clashes with other invocations + # of this routine. + # (DanW - Openacs) + + db_exec dml $db $full_statement_name $sql + if {[uplevel {info exists __lob_id}]} { + ns_pg blob_dml_file $db [uplevel {set __lob_id}] $blob_files + uplevel {unset __lob_id} + } + } + + } else { + # PostgreSQL: + db_with_handle db { + db_exec dml $db $full_statement_name $sql + } + } +} + + +ad_proc db_resultrows {{ -dbn "" }} { + Returns the number of rows affected by the last DML command. + + @param dbn The database name to use. If empty_string, uses the default database. +} { + upvar "#0" [db_state_array_name_is -dbn $dbn] db_state + set driverkey [db_driverkey $dbn] + + switch $driverkey { + oracle { + return [ns_ora resultrows $db_state(last_used)] + } + postgresql { + return [ns_pg ntuples $db_state(last_used)] + } + nsodbc { + error "db_resultrows is not supported for this database." + } + default { + error "Unknown database driver. db_resultrows is not supported for this database." + } + } +} + + ad_proc db_0or1row {{ -dbn "" } statement_name sql args } { Usage:
db_0or1row statement-name sql [ -bind bind_set_id | -bind bind_value_list ] \ [ -column_array array_name | -column_set set_name ] - +
Performs the SQL query sql. If a row is returned, sets variables @@ -860,37 +1648,37 @@ set full_statement_name [db_qd_get_fullname $statement_name] if { [info exists column_array] && [info exists column_set] } { - return -code error "Can't specify both column_array and column_set" + return -code error "Can't specify both column_array and column_set" } if { [info exists column_array] } { - upvar 1 $column_array array_val - if { [info exists array_val] } { - unset array_val - } + upvar 1 $column_array array_val + if { [info exists array_val] } { + unset array_val + } } if { [info exists column_set] } { - upvar 1 $column_set selection + upvar 1 $column_set selection } db_with_handle -dbn $dbn db { - set selection [db_exec 0or1row $db $full_statement_name $sql] + set selection [db_exec 0or1row $db $full_statement_name $sql] } if { [empty_string_p $selection] } { - return 0 + return 0 } if { [info exists column_array] } { - for { set i 0 } { $i < [ns_set size $selection] } { incr i } { - set array_val([ns_set key $selection $i]) [ns_set value $selection $i] - } + for { set i 0 } { $i < [ns_set size $selection] } { incr i } { + set array_val([ns_set key $selection $i]) [ns_set value $selection $i] + } } elseif { ![info exists column_set] } { - for { set i 0 } { $i < [ns_set size $selection] } { incr i } { - upvar 1 [ns_set key $selection $i] value - set value [ns_set value $selection $i] - } + for { set i 0 } { $i < [ns_set size $selection] } { incr i } { + upvar 1 [ns_set key $selection $i] value + set value [ns_set value $selection $i] + } } return 1 @@ -902,7 +1690,7 @@
db_1row statement-name sql [ -bind bind_set_id | -bind bind_value_list ] \ [ -column_array array_name | -column_set set_name ] - +
Performs the SQL query sql. If a row is returned, sets variables @@ -913,7 +1701,7 @@ @param dbn The database name to use. If empty_string, uses the default database. } { if { ![uplevel db_0or1row $args] } { - return -code error "Query did not return any rows." + return -code error "Query did not return any rows." } } @@ -936,7 +1724,7 @@ In this example, db_dml triggers an error, so control passes to the on_error block which prints a readable error.
db_transaction {
- db_dml test "nonsense"
+ db_dml test "nonsense"
} on_error {
ad_return_error "Error in blah/foo/bar" "The error was: $errmsg"
}
@@ -947,9 +1735,9 @@
transaction is immediately halted and aborted.
db_transaction {
- db_dml test {insert into footest values(1)}
- nonsense
- db_dml test {insert into footest values(2)}
+ db_dml test {insert into footest values(1)}
+ nonsense
+ db_dml test {insert into footest values(2)}
}
@@ -961,68 +1749,68 @@
set arg_c [llength $args]
if { $arg_c != 0 && $arg_c != 2 } {
- # Either this is a transaction with no error handling or there must be an on_error { code } block.
- error $syn_err
+ # Either this is a transaction with no error handling or there must be an on_error { code } block.
+ error $syn_err
} elseif { $arg_c == 2 } {
- # We think they're specifying an on_error block
- if { [string compare [lindex $args 0] "on_error"] } {
- # Unexpected: they put something besides on_error as a connector.
- error $syn_err
- } else {
- # Success! We got an on_error code block.
- set on_error [lindex $args 1]
- }
+ # We think they're specifying an on_error block
+ if { [string compare [lindex $args 0] "on_error"] } {
+ # Unexpected: they put something besides on_error as a connector.
+ error $syn_err
+ } else {
+ # Success! We got an on_error code block.
+ set on_error [lindex $args 1]
+ }
}
# Make the error message and database handle available to the on_error block.
upvar errmsg errmsg
db_with_handle -dbn $dbn db {
- # Preserve the handle, since db_with_handle kills it after executing
- # this block.
- set dbh $db
- # Remember that there's a transaction happening on this handle.
- if { ![info exists db_state(transaction_level,$dbh)] } {
- set db_state(transaction_level,$dbh) 0
- }
- set level [incr db_state(transaction_level,$dbh)]
- if { $level == 1 } {
- ns_db dml $dbh "begin transaction"
- }
+ # Preserve the handle, since db_with_handle kills it after executing
+ # this block.
+ set dbh $db
+ # Remember that there's a transaction happening on this handle.
+ if { ![info exists db_state(transaction_level,$dbh)] } {
+ set db_state(transaction_level,$dbh) 0
+ }
+ set level [incr db_state(transaction_level,$dbh)]
+ if { $level == 1 } {
+ ns_db dml $dbh "begin transaction"
+ }
}
# Execute the transaction code.
set errno [catch {
- uplevel 1 $transaction_code
+ uplevel 1 $transaction_code
} errmsg]
incr db_state(transaction_level,$dbh) -1
set err_p 0
switch $errno {
- 0 {
- # TCL_OK
- }
- 2 {
- # TCL_RETURN
- }
- 3 {
- # TCL_BREAK - Abort the transaction and do the break.
- ns_db dml $dbh "abort transaction"
- db_release_unused_handles -dbn $dbn
- break
- }
- 4 {
- # TCL_CONTINUE - just ignore.
- }
- default {
- # TCL_ERROR or unknown error code: Its a real error.
- set err_p 1
- }
+ 0 {
+ # TCL_OK
+ }
+ 2 {
+ # TCL_RETURN
+ }
+ 3 {
+ # TCL_BREAK - Abort the transaction and do the break.
+ ns_db dml $dbh "abort transaction"
+ db_release_unused_handles -dbn $dbn
+ break
+ }
+ 4 {
+ # TCL_CONTINUE - just ignore.
+ }
+ default {
+ # TCL_ERROR or unknown error code: Its a real error.
+ set err_p 1
+ }
}
if { $err_p || [db_abort_transaction_p]} {
- # An error was triggered or the transaction has been aborted.
- db_abort_transaction
- if { [info exists on_error] && ![empty_string_p $on_error] } {
- # An on_error block exists, so execute it.
+ # An error was triggered or the transaction has been aborted.
+ db_abort_transaction
+ if { [info exists on_error] && ![empty_string_p $on_error] } {
+ # An on_error block exists, so execute it.
if {[string equal postgresql [db_type]]} {
# JCD: with postgres we abort the transaction prior to
# executing the on_error block since there is nothing
@@ -1034,91 +1822,91 @@
ns_db dml $dbh "abort transaction"
db_release_unused_handles
}
- set errno [catch {
- uplevel 1 $on_error
- } on_errmsg]
- # Determine what do with the error.
- set err_p 0
- switch $errno {
- 0 {
- # TCL_OK
- }
-
- 2 {
- # TCL_RETURN
- }
- 3 {
- # TCL_BREAK
- ns_db dml $dbh "abort transaction"
- db_release_unused_handles
- break
- }
- 4 {
- # TCL_CONTINUE - just ignore.
- }
- default {
- # TCL_ERROR or unknown error code: Its a real error.
- set err_p 1
- }
- }
+ set errno [catch {
+ uplevel 1 $on_error
+ } on_errmsg]
+ # Determine what do with the error.
+ set err_p 0
+ switch $errno {
+ 0 {
+ # TCL_OK
+ }
+
+ 2 {
+ # TCL_RETURN
+ }
+ 3 {
+ # TCL_BREAK
+ ns_db dml $dbh "abort transaction"
+ db_release_unused_handles
+ break
+ }
+ 4 {
+ # TCL_CONTINUE - just ignore.
+ }
+ default {
+ # TCL_ERROR or unknown error code: Its a real error.
+ set err_p 1
+ }
+ }
- if { $err_p } {
- # An error was generated from the $on_error block.
- if { $level == 1} {
- # We're at the top level, so we abort the transaction.
- set db_state(db_abort_p,$dbh) 0
- ns_db dml $dbh "abort transaction"
- }
- # We throw this error because it was thrown from the error handling code that the programmer must fix.
- global errorInfo errorCode
- error $on_errmsg $errorInfo $errorCode
- } else {
- # Good, no error thrown by the on_error block.
- if [db_abort_transaction_p] {
- # This means we should abort the transaction.
- if { $level == 1 } {
- set db_state(db_abort_p,$dbh) 0
- ns_db dml $dbh "abort transaction"
- # We still have the transaction generated error. We don't want to throw it, so we log it.
- ns_log Error "Aborting transaction due to error:\n$errmsg"
- } else {
- # Propagate the error up to the next level.
- global errorInfo errorCode
- error $errmsg $errorInfo $errorCode
- }
- } else {
- # The on_error block has resolved the transaction error. If we're at the top, commit and exit.
- # Otherwise, we continue on through the lower transaction levels.
- if { $level == 1} {
- ns_db dml $dbh "end transaction"
- }
- }
- }
- } else {
- # There is no on_error block, yet there is an error, so we propagate it.
- if { $level == 1 } {
- set db_state(db_abort_p,$dbh) 0
- ns_db dml $dbh "abort transaction"
- global errorInfo errorCode
- error "Transaction aborted: $errmsg" $errorInfo $errorCode
- } else {
- db_abort_transaction
- global errorInfo errorCode
- error $errmsg $errorInfo $errorCode
- }
- }
+ if { $err_p } {
+ # An error was generated from the $on_error block.
+ if { $level == 1} {
+ # We're at the top level, so we abort the transaction.
+ set db_state(db_abort_p,$dbh) 0
+ ns_db dml $dbh "abort transaction"
+ }
+ # We throw this error because it was thrown from the error handling code that the programmer must fix.
+ global errorInfo errorCode
+ error $on_errmsg $errorInfo $errorCode
+ } else {
+ # Good, no error thrown by the on_error block.
+ if [db_abort_transaction_p] {
+ # This means we should abort the transaction.
+ if { $level == 1 } {
+ set db_state(db_abort_p,$dbh) 0
+ ns_db dml $dbh "abort transaction"
+ # We still have the transaction generated error. We don't want to throw it, so we log it.
+ ns_log Error "Aborting transaction due to error:\n$errmsg"
+ } else {
+ # Propagate the error up to the next level.
+ global errorInfo errorCode
+ error $errmsg $errorInfo $errorCode
+ }
+ } else {
+ # The on_error block has resolved the transaction error. If we're at the top, commit and exit.
+ # Otherwise, we continue on through the lower transaction levels.
+ if { $level == 1} {
+ ns_db dml $dbh "end transaction"
+ }
+ }
+ }
+ } else {
+ # There is no on_error block, yet there is an error, so we propagate it.
+ if { $level == 1 } {
+ set db_state(db_abort_p,$dbh) 0
+ ns_db dml $dbh "abort transaction"
+ global errorInfo errorCode
+ error "Transaction aborted: $errmsg" $errorInfo $errorCode
+ } else {
+ db_abort_transaction
+ global errorInfo errorCode
+ error $errmsg $errorInfo $errorCode
+ }
+ }
} else {
- # There was no error from the transaction code.
- if [db_abort_transaction_p] {
- # The user requested the transaction be aborted.
- if { $level == 1 } {
- set db_state(db_abort_p,$dbh) 0
- ns_db dml $dbh "abort transaction"
- }
- } elseif { $level == 1 } {
- # Success! No errors and no requested abort. Commit.
- ns_db dml $dbh "end transaction"
- }
+ # There was no error from the transaction code.
+ if [db_abort_transaction_p] {
+ # The user requested the transaction be aborted.
+ if { $level == 1 } {
+ set db_state(db_abort_p,$dbh) 0
+ ns_db dml $dbh "abort transaction"
+ }
+ } elseif { $level == 1 } {
+ # Success! No errors and no requested abort. Commit.
+ ns_db dml $dbh "end transaction"
+ }
}
}
@@ -1134,8 +1922,8 @@
upvar "#0" [db_state_array_name_is -dbn $dbn] db_state
db_with_handle -dbn $dbn db {
- # We set the abort flag to true.
- set db_state(db_abort_p,$db) 1
+ # We set the abort flag to true.
+ set db_state(db_abort_p,$db) 1
}
}
@@ -1146,12 +1934,12 @@
upvar "#0" [db_state_array_name_is -dbn $dbn] db_state
db_with_handle -dbn $dbn db {
- if { [info exists db_state(db_abort_p,$db)] } {
- return $db_state(db_abort_p,$db)
- } else {
- # No abort flag registered, so we assume everything is ok.
- return 0
- }
+ if { [info exists db_state(db_abort_p,$db)] } {
+ return $db_state(db_abort_p,$db)
+ } else {
+ # No abort flag registered, so we assume everything is ok.
+ return 0
+ }
}
}
@@ -1167,3 +1955,969 @@
}
return $dbtype
}
+
+
+ad_proc db_get_username {{ -dbn "" }} {
+ Returns the username parameter from the driver section of the
+ first database pool for the dbn.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ set pool [lindex [db_available_pools -dbn $dbn] 0]
+ return [ns_config "ns/db/pool/$pool" User]
+}
+
+ad_proc db_get_password {{ -dbn "" }} {
+ Returns the password parameter from the driver section of the
+ first database pool for the dbn.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ set pool [lindex [db_available_pools -dbn $dbn] 0]
+ return [ns_config "ns/db/pool/$pool" Password]
+}
+
+ad_proc db_get_sql_user {{ -dbn "" }} {
+ Oracle only.
+
+
+ Returns a valid Oracle user@database/password string to access a
+ database through sqlplus.
+
+
+ This proc may well work for databases other than Oracle,
+ but its return value won't really be of any use.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ set pool [lindex [db_available_pools -dbn $dbn] 0]
+ set datasource [ns_config "ns/db/pool/$pool" DataSource]
+ if { ![empty_string_p $datasource] && ![string is space $datasource] } {
+ return "[ns_config ns/db/pool/$pool User]/[ns_config ns/db/pool/$pool Password]@$datasource"
+ } else {
+ return "[ns_config ns/db/pool/$pool User]/[ns_config ns/db/pool/$pool Password]"
+ }
+}
+
+
+ad_proc db_get_pgbin {{ -dbn "" }} {
+ PostgreSQL only.
+
+
+ Returns the pgbin parameter from the driver section of the first database pool.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ set pool [lindex [db_available_pools -dbn $dbn] 0]
+ set driver [ns_config "ns/db/pool/$pool" Driver]
+ return [ns_config "ns/db/driver/$driver" pgbin]
+}
+
+
+ad_proc db_get_port {{ -dbn "" }} {
+ PostgreSQL only.
+
+
+ Returns the port number from the first database pool. It assumes the
+ datasource is properly formatted since we've already verified that we
+ can connect to the pool.
+ It returns an empty string for an empty port value.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ set pool [lindex [db_available_pools -dbn $dbn] 0]
+ set datasource [ns_config "ns/db/pool/$pool" DataSource]
+ set last_colon_pos [string last ":" $datasource]
+ if { $last_colon_pos == -1 } {
+ ns_log Error "datasource contains no \":\"? datasource = $datasource"
+ return ""
+ }
+ set first_colon_pos [string first ":" $datasource]
+
+ if { $first_colon_pos == $last_colon_pos || [expr $last_colon_pos - $first_colon_pos] == 1 } {
+ # No port specified
+ return ""
+ }
+
+ return [string range $datasource [expr $first_colon_pos + 1] [expr $last_colon_pos - 1] ]
+}
+
+
+ad_proc db_get_database {{ -dbn "" }} {
+ PostgreSQL only.
+
+
+ Returns the database name from the first database pool. It assumes the
+ datasource is properly formatted since we've already verified that we
+ can connect to the pool.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ set pool [lindex [db_available_pools -dbn $dbn] 0]
+ set datasource [ns_config "ns/db/pool/$pool" DataSource]
+ set last_colon_pos [string last ":" $datasource]
+ if { $last_colon_pos == -1 } {
+ ns_log Error "datasource contains no \":\"? datasource = $datasource"
+ return ""
+ }
+ return [string range $datasource [expr $last_colon_pos + 1] end]
+}
+
+
+ad_proc db_get_dbhost {{ -dbn "" }} {
+ PostgreSQL only.
+
+
+ Returns the name of the database host from the first database pool.
+ It assumes the datasource is properly formatted since we've already
+ verified that we can connect to the pool.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ set pool [lindex [db_available_pools -dbn $dbn] 0]
+ set datasource [ns_config "ns/db/pool/$pool" DataSource]
+ set first_colon_pos [string first ":" $datasource]
+ if { $first_colon_pos == -1 } {
+ ns_log Error "datasource contains no \":\"? datasource = $datasource"
+ return ""
+ }
+ return [string range $datasource 0 [expr $first_colon_pos - 1]]
+}
+
+
+ad_proc db_source_sql_file {{
+ -dbn ""
+ -callback apm_ns_write_callback
+} file } {
+ Sources a SQL file into Oracle (SQL*Plus format file) or
+ PostgreSQL (psql format file).
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ set proc_name {db_source_sql_file}
+ set driverkey [db_driverkey $dbn]
+
+ switch $driverkey {
+
+ oracle {
+ global env
+ set user_pass [db_get_sql_user -dbn $dbn]
+ cd [file dirname $file]
+ set fp [open "|[file join $env(ORACLE_HOME) bin sqlplus] $user_pass @$file" "r"]
+
+ while { [gets $fp line] >= 0 } {
+ # Don't bother writing out lines which are purely whitespace.
+ if { ![string is space $line] } {
+ apm_callback_and_log $callback "[ad_quotehtml $line]\n"
+ }
+ }
+ close $fp
+ }
+
+ postgresql {
+ global tcl_platform
+ set file_name [file tail $file]
+
+ set pguser [db_get_username]
+ if { ![string equal $pguser ""] } {
+ set pguser "-U $pguser"
+ }
+
+ set pgport [db_get_port]
+ if { ![string equal $pgport ""] } {
+ set pgport "-p $pgport"
+ }
+
+ set pgpass [db_get_password]
+ if { ![string equal $pgpass ""] } {
+ set pgpass "<<$pgpass"
+ }
+
+ # DRB: Submitted patch was in error - the driver opens a -h hostname connection
+ # unless the hostname is localhost. We need to do the same here. The submitted
+ # patch checked for a blank hostname, which fails in the driver. Arguably the
+ # driver's wrong but a lot of non-OpenACS folks use it, and even though I'm the
+ # maintainer we shouldn't break existing code over such trivialities...
+
+ if { [string equal [db_get_dbhost] "localhost"] || [string equal [db_get_dbhost] ""] } {
+ set pghost ""
+ } else {
+ set pghost "-h [db_get_dbhost]"
+ }
+
+ cd [file dirname $file]
+
+ if { $tcl_platform(platform) == "windows" } {
+ set fp [open "|[file join [db_get_pgbin] psql] -h [ns_info hostname] $pgport $pguser -f $file_name [db_get_database]" "r"]
+ } else {
+ set fp [open "|[file join [db_get_pgbin] psql] $pghost $pgport $pguser -f $file_name [db_get_database] $pgpass" "r"]
+ }
+
+ while { [gets $fp line] >= 0 } {
+ # Don't bother writing out lines which are purely whitespace.
+ if { ![string is space $line] } {
+ apm_callback_and_log $callback "[ad_quotehtml $line]\n"
+ }
+ }
+
+ # PSQL dumps errors and notice information on stderr, and has no option to turn
+ # this off. So we have to chug through the "error" lines looking for those that
+ # really signal an error.
+
+ set errno [ catch {
+ close $fp
+ } error]
+
+ if { $errno == 2 } {
+ return $error
+ }
+
+ # Just filter out the "NOTICE" lines, so we get the stack dump along with real
+ # ERRORs. This could be done with a couple of opaque-looking regexps...
+
+ set error_found 0
+ foreach line [split $error "\n"] {
+ if { [string first NOTICE $line] == -1 } {
+ append error_lines "$line\n"
+ set error_found [expr { $error_found || [string first ERROR $line] != -1 || \
+ [string first FATAL $line] != -1 } ]
+ }
+ }
+
+ if { $error_found } {
+ global errorCode
+ return -code error -errorinfo $error_lines -errorcode $errorCode
+ }
+
+ }
+
+ nsodbc {
+ error "$proc_name is not supported for this database."
+ }
+ default {
+ error "$proc_name is not supported for this database."
+ }
+ }
+}
+
+
+ad_proc db_source_sqlj_file {{
+ -dbn ""
+ -callback apm_ns_write_callback
+} file } {
+ Oracle only.
+
+ Sources a SQLJ file using loadjava.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ global env
+ set user_pass [db_get_sql_user -dbn $dbn]
+ set fp [open "|[file join $env(ORACLE_HOME) bin loadjava] -verbose -user $user_pass $file" "r"]
+
+ # Despite the fact that this works, the text does not get written to the stream.
+ # The output is generated as an error when you attempt to close the input stream as
+ # done below.
+ while { [gets $fp line] >= 0 } {
+ # Don't bother writing out lines which are purely whitespace.
+ if { ![string is space $line] } {
+ apm_callback_and_log $callback "[ad_quotehtml $line]\n"
+ }
+ }
+ if { [catch {
+ close $fp
+ } errmsg] } {
+ apm_callback_and_log $callback "[ad_quotehtml $errmsg]\n"
+ }
+}
+
+
+ad_proc -public db_tables {
+ -pattern
+ {-dbn ""}
+} {
+ Returns a Tcl list of all the tables owned by the connected user.
+
+ @param pattern Will be used as LIKE 'pattern%' to limit the number of tables returned.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+
+ @author Don Baccus (dhogaza@pacifier.com)
+ @author Lars Pind (lars@pinds.com)
+
+ @change-log yon@arsdigita.com 20000711 changed to return lower case table names
+} {
+ set proc_name {db_tables}
+ set driverkey [db_driverkey $dbn]
+
+ switch $driverkey {
+ oracle {
+ set sql_table_names_with_pattern {
+ select lower(table_name) as table_name
+ from user_tables
+ where table_name like upper(:pattern)
+ }
+ set sql_table_names_without_pattern {
+ select lower(table_name) as table_name
+ from user_tables
+ }
+ }
+
+ postgresql {
+ set sql_table_names_with_pattern {
+ select relname
+ from pg_class
+ where relname like lower(:pattern) and
+ relname !~ '^pg_' and relkind = 'r'
+ }
+ set sql_table_names_without_pattern {
+ select relname
+ from pg_class
+ where relname !~ '^pg_' and relkind = 'r'
+ }
+ }
+
+ nsodbc -
+ default {
+ error "$proc_name is not supported for this database."
+ }
+ }
+
+ set tables [list]
+ if { [info exists pattern] } {
+ db_foreach -dbn $dbn table_names_with_pattern \
+ $sql_table_names_with_pattern {
+ lappend tables $table_name
+ }
+ } else {
+ db_foreach -dbn $dbn table_names_without_pattern \
+ $sql_table_names_without_pattern {
+ lappend tables $table_name
+ }
+ }
+
+ return $tables
+}
+
+
+ad_proc -public db_table_exists {{ -dbn "" } table_name } {
+ Returns 1 if a table with the specified name exists in the database, otherwise 0.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+
+ @author Don Baccus (dhogaza@pacifier.com)
+ @author Lars Pind (lars@pinds.com)
+} {
+ set proc_name {db_table_exists}
+ set driverkey [db_driverkey $dbn]
+
+ switch $driverkey {
+ oracle {
+ set n_rows [db_string -dbn $dbn table_count {
+ select count(*) from user_tables
+ where table_name = upper(:table_name)
+ }]
+ }
+
+ postgresql {
+ set n_rows [db_string -dbn $dbn table_count {
+ select count(*) from pg_class
+ where relname = lower(:table_name) and
+ relname !~ '^pg_' and relkind = 'r'
+ }]
+ }
+
+ nsodbc -
+ default {
+ error "$proc_name is not supported for this database."
+ }
+ }
+
+ return $n_rows
+}
+
+
+ad_proc -public db_columns {{ -dbn "" } table_name } {
+ Returns a Tcl list of all the columns in the table with the given name.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+
+ @author Lars Pind (lars@pinds.com)
+
+ @change-log yon@arsdigita.com 20000711 changed to return lower case column names
+} {
+ set columns [list]
+
+ # Works for both Oracle and PostgreSQL:
+ db_foreach -dbn $dbn table_column_names {
+ select lower(column_name) as column_name
+ from user_tab_columns
+ where table_name = upper(:table_name)
+ } {
+ lappend columns $column_name
+ }
+
+ return $columns
+}
+
+
+ad_proc -public db_column_exists {{ -dbn "" } table_name column_name } {
+ Returns 1 if the row exists in the table, 0 if not.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+
+ @author Lars Pind (lars@pinds.com)
+} {
+ set columns [list]
+
+ # Works for both Oracle and PostgreSQL:
+ set n_rows [db_string -dbn $dbn column_exists {
+ select count(*)
+ from user_tab_columns
+ where table_name = upper(:table_name)
+ and column_name = upper(:column_name)
+ }]
+
+ return [expr {$n_rows > 0}]
+}
+
+
+ad_proc -public db_column_type {{ -dbn "" } table_name column_name } {
+
+ Returns the Oracle Data Type for the specified column.
+ Returns -1 if the table or column doesn't exist.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+
+ @author Yon Feldman (yon@arsdigita.com)
+
+ @change-log 10 July, 2000: changed to return error
+ if column name doesn't exist
+ (mdettinger@arsdigita.com)
+
+ @change-log 11 July, 2000: changed to return lower case data types
+ (yon@arsdigita.com)
+
+ @change-log 11 July, 2000: changed to return error using the db_string default clause
+ (yon@arsdigita.com)
+
+} {
+ # Works for both Oracle and PostgreSQL:
+ return [db_string -dbn $dbn column_type_select "
+ select data_type as data_type
+ from user_tab_columns
+ where upper(table_name) = upper(:table_name)
+ and upper(column_name) = upper(:column_name)
+ " -default "-1"]
+}
+
+
+ad_proc -public ad_column_type {{ -dbn "" } table_name column_name } {
+
+ Returns 'numeric' for number type columns, 'text' otherwise
+ Throws an error if no such column exists.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+
+ @author Yon Feldman (yon@arsdigita.com)
+
+} {
+ set column_type [db_column_type -dbn $dbn $table_name $column_name]
+
+ if { $column_type == -1 } {
+ return "Either table $table_name doesn't exist or column $column_name doesn't exist"
+ } elseif { [string compare $column_type "NUMBER"] } {
+ return "numeric"
+ } else {
+ return "text"
+ }
+}
+
+
+ad_proc db_write_clob {{ -dbn "" } statement_name sql args } {
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ ad_arg_parser { bind } $args
+ set proc_name {db_write_clob}
+ set driverkey [db_driverkey $dbn]
+
+ # TODO: Below, is db_qd_get_fullname necessary? Why this
+ # difference between Oracle and Postgres code?
+ # --atp@piskorski.com, 2003/04/09 10:00 EDT
+
+ switch $driverkey {
+ oracle {
+ set full_statement_name [db_qd_get_fullname $statement_name]
+ db_with_handle -dbn $dbn db {
+ db_exec write_clob $db $full_statement_name $sql
+ }
+ }
+
+ postgresql {
+ db_with_handle -dbn $dbn db {
+ db_exec write_clob $db $statement_name $sql
+ }
+ }
+
+ nsodbc -
+ default {
+ error "$proc_name is not supported for this database."
+ }
+ }
+}
+
+
+ad_proc db_write_blob {{ -dbn "" } statement_name sql args } {
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ ad_arg_parser { bind } $args
+ set full_statement_name [db_qd_get_fullname $statement_name]
+ db_with_handle -dbn $dbn db {
+ db_exec_lob write_blob $db $full_statement_name $sql
+ }
+}
+
+
+ad_proc db_blob_get_file {{ -dbn "" } statement_name sql args } {
+ @param dbn The database name to use. If empty_string, uses the default database.
+
+
+ TODO:
+ This proc should probably be changed to take a final
+ file argument, only, rather than the current
+ args variable length argument list. Currently, it is
+ called only 4 places in OpenACS, and each place args,
+ if used at all, is always "-file $file". However,
+ such a change might break custom code... I'm not sure.
+ --atp@piskorski.com, 2003/04/09 11:39 EDT
+
+} {
+ ad_arg_parser { bind file args } $args
+ set proc_name {db_blob_get_file}
+ set driverkey [db_driverkey $dbn]
+
+ set full_statement_name [db_qd_get_fullname $statement_name]
+
+ switch $driverkey {
+ oracle {
+ db_with_handle -dbn $dbn db {
+ eval [list db_exec_lob blob_get_file $db $full_statement_name $sql $file]
+ }
+ }
+
+ postgresql {
+ db_with_handle -dbn $dbn db {
+ db_exec_lob blob_select_file $db $full_statement_name $sql $file
+ }
+ }
+
+ nsodbc -
+ default {
+ error "$proc_name is not supported for this database."
+ }
+ }
+}
+
+
+ad_proc db_blob_get {{ -dbn "" } statement_name sql args } {
+ PostgreSQL only.
+
+ @param dbn The database name to use. If empty_string, uses the default database.
+} {
+ ad_arg_parser { bind } $args
+ set proc_name {db_blob_get}
+ set driverkey [db_driverkey $dbn]
+
+ switch $driverkey {
+
+ postgresql {
+ set full_statement_name [db_qd_get_fullname $statement_name]
+ db_with_handle -dbn $dbn db {
+ set data [db_exec_lob blob_get $db $full_statement_name $sql]
+ }
+ return $data
+ }
+
+ oracle -
+ nsodbc -
+ default {
+ error "$proc_name is not supported for this database."
+ }
+ }
+}
+
+
+ad_proc -private db_exec_lob {{
+ -ulevel 2
+} type db statement_name pre_sql { file "" } } {
+
+ A helper procedure to execute a SQL statement, potentially binding
+ depending on the value of the $bind variable in the calling environment
+ (if set).
+} {
+ set proc_name {db_exec_lob}
+ set driverkey [db_driverkey -handle_p 1 $db]
+
+ # Note: db_exec_lob is marked as private and in the entire
+ # toolkit, is ONLY called from a few other procs defined in this
+ # same file. So we definitely could change it to take a -dbn
+ # switch and remove the passed in db handle altogether, and call
+ # 'db_driverkey -dbn' rather than 'db_driverkey -handle'. But,
+ # db_exec NEEDS 'db_driverkey -handle', so we might as well use it
+ # here too. --atp@piskorski.com, 2003/04/09 12:13 EDT
+
+ # TODO: Using this as a wrapper for the separate _oracle and
+ # _postgresql versions of this proc is ugly. But also simplest
+ # and safest at this point, as it let me change as little as
+ # possible of those two relatively complex procs.
+ # --atp@piskorski.com, 2003/04/09 11:55 EDT
+
+ switch $driverkey {
+ oracle {
+ set which_proc {db_exec_lob_oracle}
+ }
+ postgresql {
+ set which_proc {db_exec_lob_postgresql}
+ }
+
+ nsodbc -
+ default {
+ error "$proc_name is not supported for this database."
+ }
+ }
+
+ ns_log Notice "$proc_name: atp: $which_proc -ulevel [expr {$ulevel +1}] $type $db $statement_name $pre_sql $file"
+ return [$which_proc -ulevel [expr {$ulevel +1}] $type $db $statement_name $pre_sql $file]
+}
+
+
+ad_proc -private db_exec_lob_oracle {{
+ -ulevel 2
+} type db statement_name pre_sql { file "" } } {
+
+ A helper procedure to execute a SQL statement, potentially binding
+ depending on the value of the $bind variable in the calling environment
+ (if set).
+} {
+ set start_time [clock clicks]
+
+ db_qd_log QDDebug "PRE-QD: the SQL is $pre_sql for $statement_name"
+
+ # Query Dispatcher (OpenACS - ben)
+ set sql [db_qd_replace_sql $statement_name $pre_sql]
+
+ # insert tcl variable values (Openacs - Dan)
+ if {![string equal $sql $pre_sql]} {
+ set sql [uplevel $ulevel [list subst -nobackslashes $sql]]
+ }
+
+ set file_storage_p 0
+ upvar $ulevel storage_type storage_type
+
+ if {[info exists storage_type] && [string equal $storage_type file]} {
+ set file_storage_p 1
+ set original_type $type
+ set qtype 1row
+ ns_log Notice "db_exec_lob: file storage in use"
+ } else {
+ set qtype $type
+ ns_log Notice "db_exec_lob: blob storage in use"
+ }
+
+ db_qd_log QDDebug "POST-QD: the SQL is $sql"
+
+ set errno [catch {
+ upvar bind bind
+
+ # Below, note that 'ns_ora blob_get_file' takes 3 parameters,
+ # while 'ns_ora write_blob' takes only 2. So if file is empty
+ # string (which it always will/should be for $qtype
+ # write_blob), we must not pass any 3rd parameter to the
+ # ns_ora command: --atp@piskorski.com, 2003/04/09 15:10 EDT
+
+ if { [info exists bind] && [llength $bind] != 0 } {
+ if { [llength $bind] == 1 } {
+ if { [empty_string_p $file] } {
+ set selection [eval [list ns_ora $qtype $db -bind $bind $sql]]
+ } else {
+ set selection [eval [list ns_ora $qtype $db -bind $bind $sql $file]]
+ }
+
+ } else {
+ set bind_vars [ns_set create]
+ foreach { name value } $bind {
+ ns_set put $bind_vars $name $value
+ }
+ if { [empty_string_p $file] } {
+ set selection [eval [list ns_ora $qtype $db -bind $bind_vars $sql]]
+ } else {
+ set selection [eval [list ns_ora $qtype $db -bind $bind_vars $sql $file]]
+ }
+ }
+
+ } else {
+ if { [empty_string_p $file] } {
+ set selection [uplevel $ulevel [list ns_ora $qtype $db $sql]]
+ } else {
+ set selection [uplevel $ulevel [list ns_ora $qtype $db $sql $file]]
+ }
+ }
+
+ if {$file_storage_p} {
+ set content [ns_set value $selection 0]
+ for {set i 0} {$i < [ns_set size $selection]} {incr i} {
+ set name [ns_set key $selection $i]
+ if {[string equal $name content]} {
+ set content [ns_set value $selection $i]
+ }
+ }
+
+ switch $original_type {
+
+ blob_get_file {
+ if {[file exists $content]} {
+ file copy -- $content $file
+ return $selection
+ } else {
+ error "file: $content doesn't exist"
+ }
+ }
+
+ write_blob {
+
+ if {[file exists $content]} {
+ set ofp [open $content r]
+ fconfigure $ofp -encoding binary
+ ns_writefp $ofp
+ close $ofp
+ return $selection
+ } else {
+ error "file: $content doesn't exist"
+ }
+ }
+ }
+ } else {
+ return $selection
+ }
+
+ } error]
+
+ ad_call_proc_if_exists ds_collect_db_call $db $type $statement_name $sql $start_time $errno $error
+ if { $errno == 2 } {
+ return $error
+ }
+
+ global errorInfo errorCode
+ return -code $errno -errorinfo $errorInfo -errorcode $errorCode $error
+}
+
+
+ad_proc -private db_exec_lob_postgresql {{
+ -ulevel 2
+} type db statement_name pre_sql { file "" } } {
+
+ A helper procedure to execute a SQL statement, potentially binding
+ depending on the value of the $bind variable in the calling environment
+ (if set).
+
+ Low level replacement for db_exec which emulates blob handling.
+
+} {
+ set start_time [clock clicks]
+
+ # Query Dispatcher (OpenACS - ben)
+ set sql [db_qd_replace_sql $statement_name $pre_sql]
+
+ # insert tcl variable values (Openacs - Dan)
+ if {![string equal $sql $pre_sql]} {
+ set sql [uplevel $ulevel [list subst -nobackslashes $sql]]
+ }
+ # create a function definition statement for the inline code
+ # binding is emulated in tcl. (OpenACS - Dan)
+
+ set errno [catch {
+ upvar bind bind
+ if { [info exists bind] && [llength $bind] != 0 } {
+ if { [llength $bind] == 1 } {
+ set bind_vars [list]
+ set len [ns_set size $bind]
+ for {set i 0} {$i < $len} {incr i} {
+ lappend bind_vars [ns_set key $bind $i] \
+ [ns_set value $bind $i]
+ }
+ set lob_sql [db_bind_var_substitution $sql $bind_vars]
+ } else {
+ set lob_sql [db_bind_var_substitution $sql $bind]
+ }
+ } else {
+ set lob_sql [uplevel $ulevel [list db_bind_var_substitution $sql]]
+ }
+
+ # get the content - asssume it is in column 0, or optionally it can
+ # be returned as "content" with the storage type indicated by the
+ # "storage_type" column.
+
+ set selection [ns_db 1row $db $lob_sql]
+ set content [ns_set value $selection 0]
+ for {set i 0} {$i < [ns_set size $selection]} {incr i} {
+ set name [ns_set key $selection $i]
+ if {[string equal $name storage_type]} {
+ set storage_type [ns_set value $selection $i]
+ } elseif {[string equal $name content]} {
+ set content [ns_set value $selection $i]
+ }
+ }
+
+ # this is an ugly hack, but it allows content to be written
+ # to a file/connection if it is stored as a lob or if it is
+ # stored in the content-repository as a file. (DanW - Openacs)
+
+ switch $type {
+
+ blob_get {
+
+ if {[info exists storage_type]} {
+ switch $storage_type {
+ file {
+ if {[file exists $content]} {
+ set ifp [open $content r]
+
+ # DRB: this could be made faster by setting the buffersize
+ # to the size of the file, but for very large files allocating
+ # that much more memory on top of that needed by Tcl for storage
+ # of the data might not be wise.
+
+ fconfigure $ifp -translation binary
+
+ set data [read $ifp]
+ close $ifp
+ return $data
+ } else {
+ error "file: $content doesn't exist"
+ }
+ }
+
+ lob {
+ if {[regexp {^[0-9]+$} $content match]} {
+ return [ns_pg blob_get $db $content]
+ } else {
+ error "invalid lob_id: should be an integer"
+ }
+ }
+
+ default {
+ error "invalid storage type"
+ }
+ }
+ } elseif {[file exists $content]} {
+ set ifp [open $content r]
+ fconfigure $ifp -translation binary
+ set data [read $ifp]
+ close $ifp
+ return $data
+ } elseif {[regexp {^[0-9]+$} $content match]} {
+ return [ns_pg blob_get $db $content]
+ } else {
+ error "invalid query"
+ }
+ }
+
+ blob_select_file {
+
+ if {[info exists storage_type]} {
+ switch $storage_type {
+ file {
+ if {[file exists $content]} {
+ file copy -- $content $file
+ } else {
+ error "file: $content doesn't exist"
+ }
+ }
+
+ lob {
+ if {[regexp {^[0-9]+$} $content match]} {
+ ns_pg blob_select_file $db $content $file
+ } else {
+ error "invalid lob_id: should be an integer"
+ }
+ }
+
+ default {
+ error "invalid storage type"
+ }
+ }
+ } elseif {[file exists $content]} {
+ file copy -- $content $file
+ } elseif {[regexp {^[0-9]+$} $content match]} {
+ ns_pg blob_select_file $db $content $file
+ } else {
+ error "invalid query"
+
+ # TODO: Page /file-storage/download-archive/index
+ # fails here on cvs head both before and after my
+ # mult-db db_* api work, I don't know why. See bug:
+ # http://openacs.org/bugtracker/openacs/com/file-storage/bug?bug%5fnumber=427
+ # --atp@piskorski.com, 2003/04/09 18:04 EDT
+ }
+ }
+
+ write_blob {
+
+ if {[info exists storage_type]} {
+ switch $storage_type {
+ file {
+ if {[file exists $content]} {
+ set ofp [open $content r]
+ fconfigure $ofp -encoding binary
+ ns_writefp $ofp
+ close $ofp
+ } else {
+ error "file: $content doesn't exist"
+ }
+ }
+
+ text {
+ ns_write $content
+ }
+
+ lob {
+ if {[regexp {^[0-9]+$} $content match]} {
+ ns_pg blob_write $db $content
+ } else {
+ error "invalid lob_id: should be an integer"
+ }
+ }
+
+ default {
+ error "invalid storage type"
+ }
+ }
+ } elseif {[file exists $content]} {
+ set ofp [open $content r]
+ fconfigure $ofp -encoding binary
+ ns_writefp $ofp
+ close $ofp
+ } elseif {[regexp {^[0-9]+$} $content match]} {
+ ns_pg blob_write $db $content
+ } else {
+ ns_write $content
+ }
+ }
+ }
+
+ return
+
+ } error]
+
+ global errorInfo errorCode
+ set errinfo $errorInfo
+ set errcode $errorCode
+
+ ad_call_proc_if_exists ds_collect_db_call $db 0or1row $statement_name $sql $start_time $errno $error
+
+ if { $errno == 2 } {
+ return $error
+ }
+
+ return -code $errno -errorinfo $errinfo -errorcode $errcode $error
+}