mirror_php/moodle
1
0
Fork 0
mirror of https://github.com/moodle/moodle.git synced 2025-01-18 14:03:52 +01:00
Code Issues Projects Releases Wiki Activity

a few more DDL comment typos

Browse Source
This commit is contained in:
Petr Skoda 2010-05-21 18:42:50 +00:00
parent 72c45dcc1b
commit a3790ed5db
4 changed files with 66 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
lib/ddl/oracle_sql_generator.php
View File

@ -30,7 +30,7 @@ require_once($CFG->libdir.'/ddl/sql_generator.php');
/// This class generate SQL code to be used against Oracle
/// It extends XMLDBgenerator so everything can be
/// overriden as needed to generate correct SQL.
/// overridden as needed to generate correct SQL.
class oracle_sql_generator extends sql_generator {
@ -89,7 +89,7 @@ class oracle_sql_generator extends sql_generator {
/**
* Given one xmldb_table, returns it's correct name, depending of all the parametrization
* Overriden to allow change of names in temp tables
* Overridden to allow change of names in temp tables
*
* @param xmldb_table table whose name we want
* @param boolean to specify if the name must be quoted (if reserved word, only!)
@ -134,7 +134,7 @@ class oracle_sql_generator extends sql_generator {
}
/**
* Given one XMLDB Type, lenght and decimals, returns the DB proper SQL type
* Given one XMLDB Type, length and decimals, returns the DB proper SQL type
*/
public function getTypeSQL($xmldb_type, $xmldb_length=null, $xmldb_decimals=null) {
@ -302,7 +302,7 @@ class oracle_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to alter the field in the table
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to alter the field in the table
* Oracle has some severe limits:
* - clob and blob fields doesn't allow type to be specified
* - error is dropped if the null/not null clause is specified and hasn't changed
@ -467,7 +467,7 @@ class oracle_sql_generator extends sql_generator {
}
}
/// If arriving here, something is not being skiped (type, notnull, default), calculate the standar AlterFieldSQL
/// If arriving here, something is not being skipped (type, notnull, default), calculate the standard AlterFieldSQL
if (!$skip_type_clause || !$skip_notnull_clause || !$skip_default_clause) {
$results = array_merge($results, parent::getAlterFieldSQL($xmldb_table, $xmldb_field, $skip_type_clause, $skip_default_clause, $skip_notnull_clause));
return $results;
@ -478,7 +478,7 @@ class oracle_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to drop its enum
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to drop its enum
* (usually invoked from getModifyEnumSQL()
*
* TODO: Moodle 2.1 - drop in Moodle 2.1
@ -497,7 +497,7 @@ class oracle_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to create its default
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to create its default
* (usually invoked from getModifyDefaultSQL()
*/
public function getCreateDefaultSQL($xmldb_table, $xmldb_field) {
@ -517,7 +517,7 @@ class oracle_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table returns one array with all the check constrainsts
* Given one xmldb_table returns one array with all the check constraints
* in the table (fetched from DB)
* Optionally the function allows one xmldb_field to be specified in
* order to return only the check constraints belonging to one field.
@ -549,7 +549,7 @@ class oracle_sql_generator extends sql_generator {
$filter = $xmldb_field->getName();
/// Lets clean a bit each constraint description, looking for the filtered field
foreach ($results as $key => $result) {
/// description starts by "$filter IN" assume it's a constraint beloging to the field
/// description starts by "$filter IN" assume it's a constraint belonging to the field
if (preg_match("/^{$filter} IN/i", $result->description)) {
$filtered_results[$key] = $result;
}

20
lib/ddl/postgres_sql_generator.php
View File

@ -30,7 +30,7 @@ require_once($CFG->libdir.'/ddl/sql_generator.php');
/// This class generate SQL code to be used against PostgreSQL
/// It extends XMLDBgenerator so everything can be
/// overriden as needed to generate correct SQL.
/// overridden as needed to generate correct SQL.
class postgres_sql_generator extends sql_generator {
@ -49,10 +49,10 @@ class postgres_sql_generator extends sql_generator {
public $enum_inline_code = false; //Does the generator need to add inline code in the column definition
public $rename_index_sql = 'ALTER TABLE OLDINDEXNAME RENAME TO NEWINDEXNAME'; //SQL sentence to rename one index
//TABLENAME, OLDINDEXNAME, NEWINDEXNAME are dinamically replaced
//TABLENAME, OLDINDEXNAME, NEWINDEXNAME are dynamically replaced
public $rename_key_sql = null; //SQL sentence to rename one key (PostgreSQL doesn't support this!)
//TABLENAME, OLDKEYNAME, NEWKEYNAME are dinamically replaced
//TABLENAME, OLDKEYNAME, NEWKEYNAME are dynamically replaced
/**
* Reset a sequence to the id field of a table.
@ -95,7 +95,7 @@ class postgres_sql_generator extends sql_generator {
}
/**
* Given one XMLDB Type, lenght and decimals, returns the DB proper SQL type
* Given one XMLDB Type, length and decimals, returns the DB proper SQL type
*/
public function getTypeSQL($xmldb_type, $xmldb_length=null, $xmldb_decimals=null) {
@ -196,7 +196,7 @@ class postgres_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to alter the field in the table
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to alter the field in the table
* PostgreSQL has some severe limits:
* - Any change of type or precision requires a new temporary column to be created, values to
* be transfered potentially casting them, to apply defaults if the column is not null and
@ -315,7 +315,7 @@ class postgres_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to drop its enum
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to drop its enum
* (usually invoked from getModifyEnumSQL()
*
* TODO: Moodle 2.1 - drop in Moodle 2.1
@ -334,7 +334,7 @@ class postgres_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to create its default
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to create its default
* (usually invoked from getModifyDefaultSQL()
*/
public function getCreateDefaultSQL($xmldb_table, $xmldb_field) {
@ -344,7 +344,7 @@ class postgres_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to drop its default
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to drop its default
* (usually invoked from getModifyDefaultSQL()
*/
public function getDropDefaultSQL($xmldb_table, $xmldb_field) {
@ -354,7 +354,7 @@ class postgres_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table returns one array with all the check constrainsts
* Given one xmldb_table returns one array with all the check constraints
* in the table (fetched from DB)
* Optionally the function allows one xmldb_field to be specified in
* order to return only the check constraints belonging to one field.
@ -390,7 +390,7 @@ class postgres_sql_generator extends sql_generator {
$description = preg_replace('/::[a-z]+/i', '', $description); // Casts out
$description = preg_replace("/({$filter})/i", '@$1@', $description);
$description = trim(preg_replace('/ or /i', ' OR ', $description)); // Uppercase or & trim
/// description starts by @$filter@ assume it's a constraint beloging to the field
/// description starts by @$filter@ assume it's a constraint belonging to the field
if (preg_match("/^@{$filter}@/i", $description)) {
$filtered_results[$key] = $result;
}

56
lib/ddl/sql_generator.php
View File

@ -21,7 +21,7 @@
* needed functions to generate proper SQL are defined.
*
* The rest of classes will inherit, by default, the same logic.
* Functions will be overriden as needed to generate correct SQL.
* Functions will be overridden as needed to generate correct SQL.
*
* @package moodlecore
* @subpackage DDL
@ -31,7 +31,7 @@
*/
/**
* Abstract sql generator class, base for all bd specific implementations.
* Abstract sql generator class, base for all db specific implementations.
*/
abstract class sql_generator {
@ -94,10 +94,10 @@ abstract class sql_generator {
//MySQL CONCAT function will be used
public $rename_table_sql = 'ALTER TABLE OLDNAME RENAME TO NEWNAME'; //SQL sentence to rename one table, both
//OLDNAME and NEWNAME are dinamically replaced
//OLDNAME and NEWNAME are dynamically replaced
public $drop_table_sql = 'DROP TABLE TABLENAME'; //SQL sentence to drop one table
//TABLENAME is dinamically replaced
//TABLENAME is dynamically replaced
public $alter_column_sql = 'ALTER TABLE TABLENAME ALTER COLUMN COLUMNSPECS'; //The SQL template to alter columns
@ -108,16 +108,16 @@ abstract class sql_generator {
public $alter_column_skip_notnull = false; //The generator will skip the null/notnull clause on alter columns
public $rename_column_sql = 'ALTER TABLE TABLENAME RENAME COLUMN OLDFIELDNAME TO NEWFIELDNAME';
///TABLENAME, OLDFIELDNAME and NEWFIELDNAME are dianmically replaced
///TABLENAME, OLDFIELDNAME and NEWFIELDNAME are dyanmically replaced
public $drop_index_sql = 'DROP INDEX INDEXNAME'; //SQL sentence to drop one index
//TABLENAME, INDEXNAME are dinamically replaced
//TABLENAME, INDEXNAME are dynamically replaced
public $rename_index_sql = 'ALTER INDEX OLDINDEXNAME RENAME TO NEWINDEXNAME'; //SQL sentence to rename one index
//TABLENAME, OLDINDEXNAME, NEWINDEXNAME are dinamically replaced
//TABLENAME, OLDINDEXNAME, NEWINDEXNAME are dynamically replaced
public $rename_key_sql = 'ALTER TABLE TABLENAME CONSTRAINT OLDKEYNAME RENAME TO NEWKEYNAME'; //SQL sentence to rename one key
//TABLENAME, OLDKEYNAME, NEWKEYNAME are dinamically replaced
//TABLENAME, OLDKEYNAME, NEWKEYNAME are dynamically replaced
public $prefix; // Prefix to be used for all the DB objects
@ -590,7 +590,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to add the field to the table
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to add the field to the table
*/
public function getAddFieldSQL($xmldb_table, $xmldb_field, $skip_type_clause = NULL, $skip_default_clause = NULL, $skip_notnull_clause = NULL) {
@ -618,7 +618,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to drop the field from the table
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to drop the field from the table
*/
public function getDropFieldSQL($xmldb_table, $xmldb_field) {
@ -635,7 +635,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to alter the field in the table
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to alter the field in the table
*/
public function getAlterFieldSQL($xmldb_table, $xmldb_field, $skip_type_clause = NULL, $skip_default_clause = NULL, $skip_notnull_clause = NULL) {
@ -669,7 +669,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to modify the default of the field in the table
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to modify the default of the field in the table
*/
public function getModifyDefaultSQL($xmldb_table, $xmldb_field) {
@ -701,9 +701,9 @@ abstract class sql_generator {
/// that we aren't trying to rename one "id" field. Although it could be
/// implemented (if adding the necessary code to rename sequences, defaults,
/// triggers... and so on under each getRenameFieldExtraSQL() function, it's
/// better to forbide it, mainly because this field is the default PK and
/// better to forbid it, mainly because this field is the default PK and
/// in the future, a lot of FKs can be pointing here. So, this field, more
/// or less, must be considered inmutable!
/// or less, must be considered immutable!
if ($xmldb_field->getName() == 'id') {
return array();
}
@ -722,7 +722,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_key, return the SQL statements needded to add the key to the table
* Given one xmldb_table and one xmldb_key, return the SQL statements needed to add the key to the table
* note that undelying indexes will be added as parametrised by $xxxx_keys and $xxxx_index parameters
*/
public function getAddKeySQL($xmldb_table, $xmldb_key) {
@ -763,7 +763,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_index, return the SQL statements needded to drop the index from the table
* Given one xmldb_table and one xmldb_index, return the SQL statements needed to drop the index from the table
*/
public function getDropKeySQL($xmldb_table, $xmldb_key) {
@ -830,7 +830,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_key, return the SQL statements needded to rename the key in the table
* Given one xmldb_table and one xmldb_key, return the SQL statements needed to rename the key in the table
* Experimental! Shouldn't be used at all!
*/
@ -867,7 +867,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_index, return the SQL statements needded to add the index to the table
* Given one xmldb_table and one xmldb_index, return the SQL statements needed to add the index to the table
*/
public function getAddIndexSQL($xmldb_table, $xmldb_index) {
@ -876,7 +876,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_index, return the SQL statements needded to drop the index from the table
* Given one xmldb_table and one xmldb_index, return the SQL statements needed to drop the index from the table
*/
public function getDropIndexSQL($xmldb_table, $xmldb_index) {
@ -895,7 +895,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_index, return the SQL statements needded to rename the index in the table
* Given one xmldb_table and one xmldb_index, return the SQL statements needed to rename the index in the table
* Experimental! Shouldn't be used at all!
*/
function getRenameIndexSQL($xmldb_table, $xmldb_index, $newname) {
@ -1025,12 +1025,12 @@ abstract class sql_generator {
$fields = $statement->getFieldsFromInsertSentence($sentence);
/// Get the values of fields
$values = $statement->getValuesFromInsertSentence($sentence);
/// Look if we have some CONCAT value and transform it dinamically
/// Look if we have some CONCAT value and transform it dynamically
foreach($values as $key => $value) {
/// Trim single quotes
$value = trim($value,"'");
if (stristr($value, 'CONCAT') !== false){
/// Look for data between parentesis
/// Look for data between parenthesis
preg_match("/CONCAT\s*\((.*)\)$/is", trim($value), $matches);
if (isset($matches[1])) {
$part = $matches[1];
@ -1065,7 +1065,7 @@ abstract class sql_generator {
}
/**
* Given one array of elements, build de proper CONCAT expresion, based
* Given one array of elements, build de proper CONCAT expression, based
* in the $concat_character setting. If such setting is empty, then
* MySQL's CONCAT function will be used instead
*/
@ -1100,7 +1100,7 @@ abstract class sql_generator {
* Only some DB have this implemented
*/
public function isNameInUse($object_name, $type, $table_name) {
return false; //For generators not implementing introspecion,
return false; //For generators not implementing introspection,
//we always return with the name being free to be used
}
@ -1127,7 +1127,7 @@ abstract class sql_generator {
abstract public function getDropTempTableSQL($xmldb_table);
/**
* Given one XMLDB Type, lenght and decimals, returns the DB proper SQL type
* Given one XMLDB Type, length and decimals, returns the DB proper SQL type
*/
public abstract function getTypeSQL($xmldb_type, $xmldb_length=null, $xmldb_decimals=null);
@ -1166,7 +1166,7 @@ abstract class sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to drop its enum
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to drop its enum
* (usually invoked from getModifyEnumSQL()
*
* TODO: Moodle 2.1 - Drop getDropEnumSQL()
@ -1174,7 +1174,7 @@ abstract class sql_generator {
public abstract function getDropEnumSQL($xmldb_table, $xmldb_field);
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to drop its default
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to drop its default
* (usually invoked from getModifyDefaultSQL()
*
* TODO: Moodle 2.1 - Drop getDropDefaultSQL()
@ -1191,7 +1191,7 @@ abstract class sql_generator {
public abstract function getCheckConstraintsFromDB($xmldb_table, $xmldb_field=null);
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to add its default
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to add its default
* (usually invoked from getModifyDefaultSQL()
*/
public abstract function getCreateDefaultSQL($xmldb_table, $xmldb_field);

38
lib/ddl/sqlite_sql_generator.php
View File

@ -29,7 +29,7 @@ require_once($CFG->libdir.'/ddl/sql_generator.php');
/// This class generate SQL code to be used against SQLite
/// It extends XMLDBgenerator so everything can be
/// overriden as needed to generate correct SQL.
/// overridden as needed to generate correct SQL.
class sqlite_sql_generator extends sql_generator {
@ -57,13 +57,13 @@ class sqlite_sql_generator extends sql_generator {
public $enum_extra_code = false; //Does the generator need to add extra code to generate code for the enums in the table
public $drop_index_sql = 'ALTER TABLE TABLENAME DROP INDEX INDEXNAME'; //SQL sentence to drop one index
//TABLENAME, INDEXNAME are dinamically replaced
//TABLENAME, INDEXNAME are dynamically replaced
public $rename_index_sql = null; //SQL sentence to rename one index (MySQL doesn't support this!)
//TABLENAME, OLDINDEXNAME, NEWINDEXNAME are dinamically replaced
//TABLENAME, OLDINDEXNAME, NEWINDEXNAME are dynamically replaced
public $rename_key_sql = null; //SQL sentence to rename one key (MySQL doesn't support this!)
//TABLENAME, OLDKEYNAME, NEWKEYNAME are dinamically replaced
//TABLENAME, OLDKEYNAME, NEWKEYNAME are dynamically replaced
/**
* Creates one new XMLDBmysql
@ -127,7 +127,7 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one XMLDB Type, lenght and decimals, returns the DB proper SQL type
* Given one XMLDB Type, length and decimals, returns the DB proper SQL type
*/
public function getTypeSQL($xmldb_type, $xmldb_length=null, $xmldb_decimals=null) {
@ -265,15 +265,15 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to alter the field in the table
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to alter the field in the table
*/
public function getAlterFieldSQL($xmldb_table, $xmldb_field, $skip_type_clause = NULL, $skip_default_clause = NULL, $skip_notnull_clause = NULL) {
return $this->getAlterTableSchema($xmldb_table, $xmldb_field, $xmldb_field);
}
/**
* Given one xmldb_table and one xmldb_key, return the SQL statements needded to add the key to the table
* note that undelying indexes will be added as parametrised by $xxxx_keys and $xxxx_index parameters
* Given one xmldb_table and one xmldb_key, return the SQL statements needed to add the key to the table
* note that underlying indexes will be added as parametrised by $xxxx_keys and $xxxx_index parameters
*/
public function getAddKeySQL($xmldb_table, $xmldb_key) {
$xmldb_table->addKey($xmldb_key);
@ -281,7 +281,7 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to create its enum
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to create its enum
* (usually invoked from getModifyEnumSQL()
*/
public function getCreateEnumSQL($xmldb_table, $xmldb_field) {
@ -289,7 +289,7 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to drop its enum
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to drop its enum
* (usually invoked from getModifyEnumSQL()
*/
public function getDropEnumSQL($xmldb_table, $xmldb_field) {
@ -297,7 +297,7 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to create its default
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to create its default
* (usually invoked from getModifyDefaultSQL()
*/
public function getCreateDefaultSQL($xmldb_table, $xmldb_field) {
@ -307,7 +307,7 @@ class sqlite_sql_generator extends sql_generator {
/**
* Given one correct xmldb_field and the new name, returns the SQL statements
* to rename it (inside one array)
* SQLite is pretty diferent from the standard to justify this oveloading
* SQLite is pretty different from the standard to justify this overloading
*/
public function getRenameFieldSQL($xmldb_table, $xmldb_field, $newname) {
$oldfield = clone($xmldb_field);
@ -316,7 +316,7 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_index, return the SQL statements needded to rename the index in the table
* Given one xmldb_table and one xmldb_index, return the SQL statements needed to rename the index in the table
*/
function getRenameIndexSQL($xmldb_table, $xmldb_index, $newname) {
/// Get the real index name
@ -328,7 +328,7 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_key, return the SQL statements needded to rename the key in the table
* Given one xmldb_table and one xmldb_key, return the SQL statements needed to rename the key in the table
* Experimental! Shouldn't be used at all!
*/
public function getRenameKeySQL($xmldb_table, $xmldb_key, $newname) {
@ -339,14 +339,14 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to drop the field from the table
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to drop the field from the table
*/
public function getDropFieldSQL($xmldb_table, $xmldb_field) {
return $this->getAlterTableSchema($xmldb_table, NULL, $xmldb_field);
}
/**
* Given one xmldb_table and one xmldb_index, return the SQL statements needded to drop the index from the table
* Given one xmldb_table and one xmldb_index, return the SQL statements needed to drop the index from the table
*/
public function getDropIndexSQL($xmldb_table, $xmldb_index) {
$xmldb_table->deleteIndex($xmldb_index->getName());
@ -354,7 +354,7 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_index, return the SQL statements needded to drop the index from the table
* Given one xmldb_table and one xmldb_index, return the SQL statements needed to drop the index from the table
*/
public function getDropKeySQL($xmldb_table, $xmldb_key) {
$xmldb_table->deleteKey($xmldb_key->getName());
@ -362,7 +362,7 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table and one xmldb_field, return the SQL statements needded to drop its default
* Given one xmldb_table and one xmldb_field, return the SQL statements needed to drop its default
* (usually invoked from getModifyDefaultSQL()
*/
public function getDropDefaultSQL($xmldb_table, $xmldb_field) {
@ -377,7 +377,7 @@ class sqlite_sql_generator extends sql_generator {
}
/**
* Given one xmldb_table returns one array with all the check constrainsts
* Given one xmldb_table returns one array with all the check constraints
* in the table (fetched from DB)
* Optionally the function allows one xmldb_field to be specified in
* order to return only the check constraints belonging to one field.