171 lines
3.1 KiB
Plaintext
171 lines
3.1 KiB
Plaintext
<?php declare(strict_types=1);
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/**
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* Query
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*
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* SQL Query Builder / Database Abstraction Layer
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*
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* PHP version 8.1
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*
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* @package Query
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* @author Timothy J. Warren <tim@timshome.page>
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* @copyright 2012 - 2023 Timothy J. Warren
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @link https://git.timshomepage.net/aviat/Query
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* @version 4.1.0
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*/
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namespace Query\Drivers\Sqlite;
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use Query\Drivers\AbstractSQL;
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use Query\Exception\NotImplementedException;
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/**
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* SQLite Specific SQL
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*/
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class SQL extends AbstractSQL
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{
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/**
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* Get the query plan for the sql query
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*/
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public function explain(string $sql): string
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{
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return "EXPLAIN QUERY PLAN {$sql}";
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}
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/**
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* Random ordering keyword
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*/
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public function random(): string
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{
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return ' RANDOM()';
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}
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/**
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* Returns sql to list other databases. Meaningless for SQLite, as this
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* just returns the database(s) that we are currently connected to.
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*/
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public function dbList(): string
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{
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return '';
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}
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/**
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* Returns sql to list tables
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*/
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public function tableList(): string
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{
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return <<<'SQL'
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SELECT "name" FROM (
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SELECT * FROM "sqlite_master" UNION ALL
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SELECT * FROM "sqlite_temp_master"
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)
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WHERE "type"='table'
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AND "name" NOT LIKE "sqlite_%"
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ORDER BY "name"
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SQL;
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}
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/**
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* List the system tables
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*
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* @return string[]
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*/
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public function systemTableList(): array
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{
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return [
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'sqlite_master',
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'sqlite_temp_master',
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'sqlite_sequence',
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];
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}
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/**
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* Returns sql to list views
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*/
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public function viewList(): string
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{
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return <<<'SQL'
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SELECT "name" FROM "sqlite_master" WHERE "type" = 'view'
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SQL;
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}
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/**
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* Returns sql to list triggers
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*/
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public function triggerList(): string
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{
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return <<<'SQL'
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SELECT "name" FROM "sqlite_master" WHERE "type"='trigger'
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SQL;
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}
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/**
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* Return sql to list functions
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*
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* @throws NotImplementedException
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*/
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public function functionList(): string
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{
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throw new NotImplementedException('Functionality does not exist in SQLite');
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}
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/**
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* Return sql to list stored procedures
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*
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* @throws NotImplementedException
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*/
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public function procedureList(): string
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{
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throw new NotImplementedException('Functionality does not exist in SQLite');
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}
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/**
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* Return sql to list sequences
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*/
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public function sequenceList(): string
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{
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return 'SELECT "name" FROM "sqlite_sequence"';
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}
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/**
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* SQL to show list of field types
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*
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* @return string[]
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*/
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public function typeList(): array
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{
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return ['INTEGER', 'REAL', 'TEXT', 'BLOB', 'NULL'];
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}
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/**
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* SQL to show information about columns in a table
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*/
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public function columnList(string $table): string
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{
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return <<<SQL
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PRAGMA table_info("{$table}")
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SQL;
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}
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/**
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* Get the list of foreign keys for the current
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* table
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*/
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public function fkList(string $table): string
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{
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return <<<SQL
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PRAGMA foreign_key_list("{$table}")
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SQL;
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}
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/**
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* Get the list of indexes for the current table
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*/
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public function indexList(string $table): string
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{
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return <<<SQL
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PRAGMA index_list("{$table}")
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SQL;
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}
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}
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