mysql index analysis works

integration-tests/__tests__/table-analyse.spec.js

@@ -2,7 +2,7 @@ const engines = require('../engines');
 const { testWrapper } = require('../tools');
 
 const t1Sql = 'CREATE TABLE t1 (id int not null primary key, val1 varchar(50) null)';
-const ix1Sql = 'CREATE index ix1 ON t1(val1)';
+const ix1Sql = 'CREATE index ix1 ON t1(val1, id)';
 const t2Sql = 'CREATE TABLE t2 (id int not null primary key, val2 varchar(50) null)';
 
 const txMatch = (tname, vcolname, nextcol) =>
@@ -120,8 +120,9 @@ describe('Table analyse', () => {
 
       const t1 = structure.tables.find(x => x.pureName == 't1');
       expect(t1.indexes.length).toEqual(1);
-      expect(t1.indexes[0].columns.length).toEqual(1);
+      expect(t1.indexes[0].columns.length).toEqual(2);
       expect(t1.indexes[0].columns[0]).toEqual(expect.objectContaining({ columnName: 'val1' }));
+      expect(t1.indexes[0].columns[1]).toEqual(expect.objectContaining({ columnName: 'id' }));
     })
   );
 });

plugins/dbgate-plugin-mysql/src/backend/Analyser.js

@@ -74,6 +74,7 @@ class Analyser extends DatabaseAnalyser {
     );
 
     const viewTexts = await this.getViewTexts(views.rows.map(x => x.pureName));
+    const indexes = await this.driver.query(this.pool, this.createQuery('indexes', ['tables']));
 
     return {
       tables: tables.rows.map(table => ({
@@ -83,6 +84,19 @@ class Analyser extends DatabaseAnalyser {
         columns: columns.rows.filter(col => col.pureName == table.pureName).map(getColumnInfo),
         primaryKey: DatabaseAnalyser.extractPrimaryKeys(table, pkColumns.rows),
         foreignKeys: DatabaseAnalyser.extractForeignKeys(table, fkColumns.rows),
+        uniques: [],
+        indexes: _.uniqBy(
+          indexes.rows.filter(idx => idx.tableName == table.pureName),
+          'constraintName'
+        ).map(idx => ({
+          ..._.pick(idx, ['constraintName', 'indexType']),
+          isUnique: !idx.nonUnique,
+          columns: indexes.rows
+            .filter(col => col.tableName == idx.tableName && col.constraintName == idx.constraintName)
+            .map(col => ({
+              ..._.pick(col, ['columnName']),
+            })),
+        })),
       })),
       views: views.rows.map(view => ({
         ...view,

plugins/dbgate-plugin-mysql/src/backend/sql/index.js

@@ -4,6 +4,7 @@ const primaryKeys = require('./primaryKeys');
 const foreignKeys = require('./foreignKeys');
 const tableModifications = require('./tableModifications');
 const views = require('./views');
+const indexes = require('./indexes');
 const programmables = require('./programmables');
 const procedureModifications = require('./procedureModifications');
 const functionModifications = require('./functionModifications');
@@ -18,4 +19,5 @@ module.exports = {
   programmables,
   procedureModifications,
   functionModifications,
+  indexes,
 };

plugins/dbgate-plugin-mysql/src/backend/sql/indexes.js

@@ -0,0 +1,11 @@
+module.exports = `
+    SELECT 
+        INDEX_NAME AS constraintName,
+        TABLE_NAME AS tableName,
+        COLUMN_NAME AS columnName,
+        INDEX_TYPE AS indexType,
+        NON_UNIQUE AS nonUnique
+    FROM INFORMATION_SCHEMA.STATISTICS
+    WHERE TABLE_SCHEMA = '#DATABASE#' AND TABLE_NAME =OBJECT_ID_CONDITION AND INDEX_NAME != 'PRIMARY' AND INDEX_NAME NOT LIKE 'IFK_%'
+    ORDER BY SEQ_IN_INDEX
+`;