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Prepare to support INSERT/UPDATE/DELETE queries, too

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This commit is contained in:
Kijin Sung 2020-06-27 00:04:19 +09:00
parent 6d251dfbe1
commit e3138f7278
5 changed files with 157 additions and 45 deletions
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124
common/framework/parsers/dbquery/query.php
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@ -13,6 +13,8 @@ class Query extends VariableBase
public $operation;
public $column;
public $pipe;
public $join_type;
public $join_conditions = array();
public $tables = array();
public $columns = array();
public $conditions = array();
@ -50,6 +52,15 @@ class Query extends VariableBase
case 'SELECT':
$result = $this->_getSelectQueryString($count_only);
break;
case 'INSERT':
$result = $this->_getInsertQueryString();
break;
case 'UPDATE':
$result = $this->_getUpdateQueryString();
break;
case 'DELETE':
$result = $this->_getDeleteQueryString();
break;
default:
$result = '';
}
@ -119,38 +130,15 @@ class Query extends VariableBase
$result .= implode(', ', $columns);
}
// Compose the table list.
$tables = array();
foreach ($this->tables as $table)
// Compose the FROM clause.
if (count($this->tables))
{
if ($table instanceof self)
$tables = $this->_arrangeTables($this->tables);
if ($tables !== '')
{
$subquery = $table->getQueryString($this->_prefix, $this->_args);
foreach ($table->getQueryParams() as $param)
{
$this->_params[] = $param;
}
$tables[] = (count($tables) ? ', ' : '') . sprintf('(%s) AS `%s`', $subquery, $table->alias);
}
else
{
$tabledef = self::quoteName($table->name) . ($table->alias ? (' AS `' . $table->alias . '`') : '');
if ($table->join_type)
{
$join_where = $this->_arrangeConditions($table->join_conditions);
if ($join_where !== '')
{
$tabledef = $tabledef . ' ON ' . $join_where;
}
$tables[] = ' ' . $table->join_type . ' ' . $tabledef;
}
else
{
$tables[] = (count($tables) ? ', ' : '') . $tabledef;
}
$result .= ' FROM ' . $tables;
}
}
$result .= ' FROM ' . implode('', $tables);
// Compose the WHERE clause.
if (count($this->conditions))
@ -245,6 +233,86 @@ class Query extends VariableBase
return $result;
}
/**
* Generate a INSERT query string.
*
* @return string
*/
protected function _getInsertQueryString(): string
{
return '';
}
/**
* Generate a UPDATE query string.
*
* @return string
*/
protected function _getUpdateQueryString(): string
{
return '';
}
/**
* Generate a DELETE query string.
*
* @return string
*/
protected function _getDeleteQueryString(): string
{
return '';
}
/**
* Generate a FROM clause from a list of tables.
*
* @param array $tables
* @return string
*/
protected function _arrangeTables(array $tables): string
{
// Initialize the result.
$result = array();
// Process each table definition.
foreach ($tables as $table)
{
// Subquery
if ($table instanceof self)
{
$tabledef = sprintf('(%s) AS `%s`', $table->getQueryString($this->_prefix, $this->_args), $table->alias);
foreach ($table->getQueryParams() as $param)
{
$this->_params[] = $param;
}
}
// Simple table
else
{
$tabledef = self::quoteName($table->name) . ($table->alias ? (' AS `' . $table->alias . '`') : '');
}
// Add join conditions
if ($table->join_type)
{
$join_where = $this->_arrangeConditions($table->join_conditions);
if ($join_where !== '')
{
$tabledef = $tabledef . ' ON ' . $join_where;
}
$result[] = ' ' . $table->join_type . ' ' . $tabledef;
}
else
{
$result[] = (count($result) ? ', ' : '') . $tabledef;
}
}
// Combine the result and return as a string.
return implode('', $result);
}
/**
* Generate a WHERE clause from a list of conditions.
*