Initial commit

node_modules/knex/lib/dialects/redshift/query/redshift-querycompiler.js

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+// Redshift Query Builder & Compiler
+// ------
+const QueryCompiler = require('../../../query/querycompiler');
+const QueryCompiler_PG = require('../../postgres/query/pg-querycompiler');
+
+const identity = require('lodash/identity');
+const {
+  columnize: columnize_,
+} = require('../../../formatter/wrappingFormatter');
+
+class QueryCompiler_Redshift extends QueryCompiler_PG {
+  truncate() {
+    return `truncate ${this.tableName.toLowerCase()}`;
+  }
+
+  // Compiles an `insert` query, allowing for multiple
+  // inserts using a single query statement.
+  insert() {
+    const sql = QueryCompiler.prototype.insert.apply(this, arguments);
+    if (sql === '') return sql;
+    this._slightReturn();
+    return {
+      sql,
+    };
+  }
+
+  // Compiles an `update` query, warning on unsupported returning
+  update() {
+    const sql = QueryCompiler.prototype.update.apply(this, arguments);
+    this._slightReturn();
+    return {
+      sql,
+    };
+  }
+
+  // Compiles an `delete` query, warning on unsupported returning
+  del() {
+    const sql = QueryCompiler.prototype.del.apply(this, arguments);
+    this._slightReturn();
+    return {
+      sql,
+    };
+  }
+
+  // simple: if trying to return, warn
+  _slightReturn() {
+    if (this.single.isReturning) {
+      this.client.logger.warn(
+        'insert/update/delete returning is not supported by redshift dialect'
+      );
+    }
+  }
+
+  forUpdate() {
+    this.client.logger.warn('table lock is not supported by redshift dialect');
+    return '';
+  }
+
+  forShare() {
+    this.client.logger.warn(
+      'lock for share is not supported by redshift dialect'
+    );
+    return '';
+  }
+
+  forNoKeyUpdate() {
+    this.client.logger.warn('table lock is not supported by redshift dialect');
+    return '';
+  }
+
+  forKeyShare() {
+    this.client.logger.warn(
+      'lock for share is not supported by redshift dialect'
+    );
+    return '';
+  }
+
+  // Compiles a columnInfo query
+  columnInfo() {
+    const column = this.single.columnInfo;
+    let schema = this.single.schema;
+
+    // The user may have specified a custom wrapIdentifier function in the config. We
+    // need to run the identifiers through that function, but not format them as
+    // identifiers otherwise.
+    const table = this.client.customWrapIdentifier(this.single.table, identity);
+
+    if (schema) {
+      schema = this.client.customWrapIdentifier(schema, identity);
+    }
+
+    const sql =
+      'select * from information_schema.columns where table_name = ? and table_catalog = ?';
+    const bindings = [
+      table.toLowerCase(),
+      this.client.database().toLowerCase(),
+    ];
+
+    return this._buildColumnInfoQuery(schema, sql, bindings, column);
+  }
+
+  jsonExtract(params) {
+    let extractions;
+    if (Array.isArray(params.column)) {
+      extractions = params.column;
+    } else {
+      extractions = [params];
+    }
+    return extractions
+      .map((extraction) => {
+        const jsonCol = `json_extract_path_text(${columnize_(
+          extraction.column || extraction[0],
+          this.builder,
+          this.client,
+          this.bindingsHolder
+        )}, ${this.client.toPathForJson(
+          params.path || extraction[1],
+          this.builder,
+          this.bindingsHolder
+        )})`;
+        const alias = extraction.alias || extraction[2];
+        return alias
+          ? this.client.alias(jsonCol, this.formatter.wrap(alias))
+          : jsonCol;
+      })
+      .join(', ');
+  }
+
+  jsonSet(params) {
+    throw new Error('Json set is not supported by Redshift');
+  }
+
+  jsonInsert(params) {
+    throw new Error('Json insert is not supported by Redshift');
+  }
+
+  jsonRemove(params) {
+    throw new Error('Json remove is not supported by Redshift');
+  }
+
+  whereJsonPath(statement) {
+    return this._whereJsonPath(
+      'json_extract_path_text',
+      Object.assign({}, statement, {
+        path: this.client.toPathForJson(statement.path),
+      })
+    );
+  }
+
+  whereJsonSupersetOf(statement) {
+    throw new Error('Json superset is not supported by Redshift');
+  }
+
+  whereJsonSubsetOf(statement) {
+    throw new Error('Json subset is not supported by Redshift');
+  }
+
+  onJsonPathEquals(clause) {
+    return this._onJsonPathEquals('json_extract_path_text', clause);
+  }
+}
+
+module.exports = QueryCompiler_Redshift;