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Moving a bunch of database module fields to NULLable
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(http://docs.moodle.org/en/XMLDB_Problems#NOT_NULL_fields_using_a_DEFAULT_.27.27_clause)
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stronk7 committed Sep 23, 2006
1 parent 88d7e62 commit b854748
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Showing 5 changed files with 178 additions and 75 deletions.
50 changes: 25 additions & 25 deletions mod/data/db/install.xml
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
<?xml version="1.0" encoding="UTF-8" ?>
<XMLDB PATH="mod/data/db" VERSION="20060921" COMMENT="XMLDB file for Moodle mod/data"
<XMLDB PATH="mod/data/db" VERSION="20060923" COMMENT="XMLDB file for Moodle mod/data"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="../../../lib/xmldb/xmldb.xsd"
>
Expand All @@ -19,15 +19,15 @@
<FIELD NAME="requiredentriestoview" TYPE="int" LENGTH="8" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="requiredentries" NEXT="maxentries"/>
<FIELD NAME="maxentries" TYPE="int" LENGTH="8" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="requiredentriestoview" NEXT="rssarticles"/>
<FIELD NAME="rssarticles" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="maxentries" NEXT="singletemplate"/>
<FIELD NAME="singletemplate" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="rssarticles" NEXT="listtemplate"/>
<FIELD NAME="listtemplate" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="singletemplate" NEXT="listtemplateheader"/>
<FIELD NAME="listtemplateheader" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="listtemplate" NEXT="listtemplatefooter"/>
<FIELD NAME="listtemplatefooter" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="listtemplateheader" NEXT="addtemplate"/>
<FIELD NAME="addtemplate" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="listtemplatefooter" NEXT="rsstemplate"/>
<FIELD NAME="rsstemplate" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="addtemplate" NEXT="rsstitletemplate"/>
<FIELD NAME="rsstitletemplate" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="rsstemplate" NEXT="csstemplate"/>
<FIELD NAME="csstemplate" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="rsstitletemplate" NEXT="jstemplate"/>
<FIELD NAME="jstemplate" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="csstemplate" NEXT="approval"/>
<FIELD NAME="singletemplate" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="rssarticles" NEXT="listtemplate"/>
<FIELD NAME="listtemplate" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="singletemplate" NEXT="listtemplateheader"/>
<FIELD NAME="listtemplateheader" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="listtemplate" NEXT="listtemplatefooter"/>
<FIELD NAME="listtemplatefooter" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="listtemplateheader" NEXT="addtemplate"/>
<FIELD NAME="addtemplate" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="listtemplatefooter" NEXT="rsstemplate"/>
<FIELD NAME="rsstemplate" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="addtemplate" NEXT="rsstitletemplate"/>
<FIELD NAME="rsstitletemplate" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="rsstemplate" NEXT="csstemplate"/>
<FIELD NAME="csstemplate" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="rsstitletemplate" NEXT="jstemplate"/>
<FIELD NAME="jstemplate" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="csstemplate" NEXT="approval"/>
<FIELD NAME="approval" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="jstemplate" NEXT="scale"/>
<FIELD NAME="scale" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="approval" NEXT="assessed"/>
<FIELD NAME="assessed" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="scale" NEXT="defaultsort"/>
Expand All @@ -46,16 +46,16 @@
<FIELD NAME="type" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="dataid" NEXT="name"/>
<FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="type" NEXT="description"/>
<FIELD NAME="description" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="param1"/>
<FIELD NAME="param1" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="description" NEXT="param2"/>
<FIELD NAME="param2" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="param1" NEXT="param3"/>
<FIELD NAME="param3" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="param2" NEXT="param4"/>
<FIELD NAME="param4" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="param3" NEXT="param5"/>
<FIELD NAME="param5" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="param4" NEXT="param6"/>
<FIELD NAME="param6" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="param5" NEXT="param7"/>
<FIELD NAME="param7" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="param6" NEXT="param8"/>
<FIELD NAME="param8" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="param7" NEXT="param9"/>
<FIELD NAME="param9" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="param8" NEXT="param10"/>
<FIELD NAME="param10" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="param9"/>
<FIELD NAME="param1" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="description" NEXT="param2"/>
<FIELD NAME="param2" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="param1" NEXT="param3"/>
<FIELD NAME="param3" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="param2" NEXT="param4"/>
<FIELD NAME="param4" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="param3" NEXT="param5"/>
<FIELD NAME="param5" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="param4" NEXT="param6"/>
<FIELD NAME="param6" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="param5" NEXT="param7"/>
<FIELD NAME="param7" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="param6" NEXT="param8"/>
<FIELD NAME="param8" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="param7" NEXT="param9"/>
<FIELD NAME="param9" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="param8" NEXT="param10"/>
<FIELD NAME="param10" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="param9"/>
</FIELDS>
<KEYS>
<KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="Primary key for data_fields" NEXT="dataid"/>
Expand All @@ -82,11 +82,11 @@
<FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" ENUM="false" NEXT="fieldid"/>
<FIELD NAME="fieldid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="recordid"/>
<FIELD NAME="recordid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" ENUM="false" PREVIOUS="fieldid" NEXT="content"/>
<FIELD NAME="content" TYPE="text" LENGTH="big" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="recordid" NEXT="content1"/>
<FIELD NAME="content1" TYPE="text" LENGTH="big" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="content" NEXT="content2"/>
<FIELD NAME="content2" TYPE="text" LENGTH="big" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="content1" NEXT="content3"/>
<FIELD NAME="content3" TYPE="text" LENGTH="big" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="content2" NEXT="content4"/>
<FIELD NAME="content4" TYPE="text" LENGTH="big" NOTNULL="true" SEQUENCE="false" ENUM="false" PREVIOUS="content3"/>
<FIELD NAME="content" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="recordid" NEXT="content1"/>
<FIELD NAME="content1" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="content" NEXT="content2"/>
<FIELD NAME="content2" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="content1" NEXT="content3"/>
<FIELD NAME="content3" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="content2" NEXT="content4"/>
<FIELD NAME="content4" TYPE="text" LENGTH="big" NOTNULL="false" SEQUENCE="false" ENUM="false" PREVIOUS="content3"/>
</FIELDS>
<KEYS>
<KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="Primary key for data_content" NEXT="recordid"/>
Expand Down
31 changes: 30 additions & 1 deletion mod/data/db/mysql.php
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Original file line number Diff line number Diff line change
Expand Up @@ -107,8 +107,37 @@ function data_upgrade($oldversion) {
modify_database('', 'ALTER TABLE prefix_data DROP COLUMN ratings;');

}

if ($oldversion < 2006092302) { // Changing some TEXT fields to NULLable and no default
execute_sql("ALTER TABLE {$CFG->prefix}data CHANGE singletemplate singletemplate text NULL AFTER rssarticles");
execute_sql("ALTER TABLE {$CFG->prefix}data CHANGE listtemplate listtemplate text NULL AFTER singletemplate");
execute_sql("ALTER TABLE {$CFG->prefix}data CHANGE listtemplateheader listtemplateheader text NULL AFTER listtemplate");
execute_sql("ALTER TABLE {$CFG->prefix}data CHANGE listtemplatefooter listtemplatefooter text NULL AFTER listtemplateheader");
execute_sql("ALTER TABLE {$CFG->prefix}data CHANGE addtemplate addtemplate text NULL AFTER listtemplatefooter");
execute_sql("ALTER TABLE {$CFG->prefix}data CHANGE rsstemplate rsstemplate text NULL AFTER addtemplate");
execute_sql("ALTER TABLE {$CFG->prefix}data CHANGE rsstitletemplate rsstitletemplate text NULL AFTER rsstemplate");
execute_sql("ALTER TABLE {$CFG->prefix}data CHANGE csstemplate csstemplate text NULL AFTER rsstitletemplate");
execute_sql("ALTER TABLE {$CFG->prefix}data CHANGE jstemplate jstemplate text NULL AFTER csstemplate");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields CHANGE param1 param1 text NULL AFTER description");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields CHANGE param2 param2 text NULL AFTER param1");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields CHANGE param3 param3 text NULL AFTER param2");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields CHANGE param4 param4 text NULL AFTER param3");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields CHANGE param5 param5 text NULL AFTER param4");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields CHANGE param6 param6 text NULL AFTER param5");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields CHANGE param7 param7 text NULL AFTER param6");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields CHANGE param8 param8 text NULL AFTER param7");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields CHANGE param9 param9 text NULL AFTER param8");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields CHANGE param10 param10 text NULL AFTER param9");

execute_sql("ALTER TABLE {$CFG->prefix}data_content CHANGE content content longtext NULL AFTER recordid");
execute_sql("ALTER TABLE {$CFG->prefix}data_content CHANGE content1 content1 longtext NULL AFTER content");
execute_sql("ALTER TABLE {$CFG->prefix}data_content CHANGE content2 content2 longtext NULL AFTER content1");
execute_sql("ALTER TABLE {$CFG->prefix}data_content CHANGE content3 content3 longtext NULL AFTER content2");
execute_sql("ALTER TABLE {$CFG->prefix}data_content CHANGE content4 content4 longtext NULL AFTER content3");
}

return true;
}

?>
?>
48 changes: 24 additions & 24 deletions mod/data/db/mysql.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -24,15 +24,15 @@ CREATE TABLE prefix_data (
requiredentriestoview int(8) unsigned NOT NULL default '0',
maxentries int(8) unsigned NOT NULL default '0',
rssarticles int(4) unsigned NOT NULL default '0',
singletemplate text NOT NULL default '',
listtemplate text NOT NULL default '',
listtemplateheader text NOT NULL default '',
listtemplatefooter text NOT NULL default '',
addtemplate text NOT NULL default '',
rsstemplate text NOT NULL default '',
rsstitletemplate text NOT NULL default '',
csstemplate text NOT NULL default '',
jstemplate text NOT NULL default '',
singletemplate text,
listtemplate text,
listtemplateheader text,
listtemplatefooter text,
addtemplate text,
rsstemplate text,
rsstitletemplate text,
csstemplate text,
jstemplate text,
approval tinyint(4) unsigned NOT NULL default '0',
scale int(10) NOT NULL default '0',
assessed int(10) unsigned NOT NULL default '0',
Expand All @@ -47,11 +47,11 @@ CREATE TABLE prefix_data_content (
id int(10) unsigned NOT NULL auto_increment,
fieldid int(10) unsigned NOT NULL default '0',
recordid int(10) unsigned NOT NULL default '0',
content longtext NOT NULL default '',
content1 longtext NOT NULL default '',
content2 longtext NOT NULL default '',
content3 longtext NOT NULL default '',
content4 longtext NOT NULL default '',
content longtext,
content1 longtext,
content2 longtext,
content3 longtext,
content4 longtext,
PRIMARY KEY (id)
) TYPE=MyISAM;

Expand All @@ -62,16 +62,16 @@ CREATE TABLE prefix_data_fields (
type varchar(255) NOT NULL default '',
name varchar(255) NOT NULL default '',
description text NOT NULL default '',
param1 text NOT NULL default '',
param2 text NOT NULL default '',
param3 text NOT NULL default '',
param4 text NOT NULL default '',
param5 text NOT NULL default '',
param6 text NOT NULL default '',
param7 text NOT NULL default '',
param8 text NOT NULL default '',
param9 text NOT NULL default '',
param10 text NOT NULL default '',
param1 text,
param2 text,
param3 text,
param4 text,
param5 text,
param6 text,
param7 text,
param8 text,
param9 text,
param10 text,
PRIMARY KEY (id)
) TYPE=MyISAM;

Expand Down
76 changes: 75 additions & 1 deletion mod/data/db/postgres7.php
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Original file line number Diff line number Diff line change
Expand Up @@ -191,8 +191,82 @@ function data_upgrade($oldversion) {
modify_database('', 'ALTER TABLE prefix_data DROP COLUMN ratings;');

}

if ($oldversion < 2006092302) { // Changing some TEXT fields to NULLable and no default
execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN singletemplate DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN singletemplate DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN listtemplate DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN listtemplate DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN listtemplateheader DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN listtemplateheader DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN listtemplatefooter DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN listtemplatefooter DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN addtemplate DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN addtemplate DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN rsstemplate DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN rsstemplate DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN rsstitletemplate DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN rsstitletemplate DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN csstemplate DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN csstemplate DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN jstemplate DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data ALTER COLUMN jstemplate DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param1 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param1 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param2 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param2 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param3 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param3 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param4 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param4 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param5 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param5 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param6 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param6 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param7 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param7 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param8 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param8 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param9 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param9 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param10 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_fields ALTER COLUMN param10 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_content ALTER COLUMN content DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_content ALTER COLUMN content DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_content ALTER COLUMN content1 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_content ALTER COLUMN content1 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_content ALTER COLUMN content2 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_content ALTER COLUMN content2 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_content ALTER COLUMN content3 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_content ALTER COLUMN content3 DROP DEFAULT");

execute_sql("ALTER TABLE {$CFG->prefix}data_content ALTER COLUMN content4 DROP NOT NULL");
execute_sql("ALTER TABLE {$CFG->prefix}data_content ALTER COLUMN content4 DROP DEFAULT");
}

return true;
}

?>
?>
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