lib/dialects/postgres/query

PostgreSQL Query Builder & Compiler

module.exports = function(client) { var _ = require('lodash'); var inherits = require('inherits'); var QueryBuilder = require('../../query/builder'); var QueryCompiler = require('../../query/compiler');

Query Builder

function QueryBuilder_PG() { this.client = client; QueryBuilder.apply(this, arguments); } inherits(QueryBuilder_PG, QueryBuilder);

Query Compiler

function QueryCompiler_PG() { this.formatter = new client.Formatter(); QueryCompiler.apply(this, arguments); } inherits(QueryCompiler_PG, QueryCompiler);

Compiles a truncate query.

QueryCompiler_PG.prototype.truncate = function() { return 'truncate ' + this.tableName + ' restart identity'; };

Used when the insert call is empty.

QueryCompiler_PG.prototype._emptyInsertValue = 'default values';

Compiles an insert query, allowing for multiple inserts using a single query statement.

QueryCompiler_PG.prototype.insert = function() { var sql = QueryCompiler.prototype.insert.call(this); var returning = this.single.returning; return { sql: sql + this._returning(returning), returning: returning }; };

Compiles an update query, allowing for a return value.

QueryCompiler_PG.prototype.update = function() { var updateData = this._prepUpdate(this.single.update); var wheres = this.where(); var returning = this.single.returning; return { sql: 'update ' + this.tableName + ' set ' + updateData.join(', ') + (wheres ? ' ' + wheres : '') + this._returning(returning), returning: returning }; };

Compiles an update query, allowing for a return value.

QueryCompiler_PG.prototype.del = function() { var sql = QueryCompiler.prototype.del.apply(this, arguments); var returning = this.single.returning; return { sql: sql + this._returning(returning), returning: returning }; }; QueryCompiler_PG.prototype._returning = function(value) { return value ? ' returning ' + this.formatter.columnize(value) : ''; }; QueryCompiler_PG.prototype.forUpdate = function() { return 'for update'; }; QueryCompiler_PG.prototype.forShare = function() { return 'for share'; };

Compiles a columnInfo query

QueryCompiler_PG.prototype.columnInfo = function() { return { sql: 'select * from information_schema.columns where table_name = ? and table_catalog = ?', bindings: [this.single.table, client.database()], output: function(resp) { return _.reduce(resp.rows, function(columns, val) { columns[val.column_name] = { type: val.data_type, maxLength: val.character_maximum_length, nullable: (val.is_nullable === 'YES'), defaultValue: val.column_default }; return columns; }, {}); } }; }; client.QueryBuilder = QueryBuilder_PG; client.QueryCompiler = QueryCompiler_PG; };