index column analysingh works for both postgres and cockroach

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

@@ -66,6 +66,7 @@ class Analyser extends DatabaseAnalyser {
       : null;
     const routines = await this.driver.query(this.pool, this.createQuery('routines', ['procedures', 'functions']));
     const indexes = await this.driver.query(this.pool, this.createQuery('indexes', ['tables']));
+    const indexcols = await this.driver.query(this.pool, this.createQuery('indexcols', ['tables']));
 
     return {
       tables: tables.rows.map(table => {
@@ -110,7 +111,14 @@ class Analyser extends DatabaseAnalyser {
             .map(idx => ({
               constraintName: idx.index_name,
               isUnique: idx.is_unique,
-              columns: idx.column_names.split('|').map(columnName => ({ columnName })),
+              columns: _.compact(
+                idx.indkey
+                  .split(' ')
+                  .map(colid => indexcols.rows.find(col => col.oid == idx.oid && col.attnum == colid))
+                  .map(col => ({
+                    columnName: col.column_name,
+                  }))
+              ),
             })),
         };
       }),

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

@@ -11,6 +11,7 @@ const routines = require('./routines');
 const routineModifications = require('./routineModifications');
 const matviewColumns = require('./matviewColumns');
 const indexes = require('./indexes');
+const indexcols = require('./indexcols');
 
 module.exports = {
   columns,
@@ -26,4 +27,5 @@ module.exports = {
   matviewModifications,
   matviewColumns,
   indexes,
+  indexcols,
 };

plugins/dbgate-plugin-postgres/src/backend/sql/indexcols.js

@@ -0,0 +1,24 @@
+module.exports = `
+    select
+        a.attname as "column_name",
+        a.attnum as "attnum",
+        a.attrelid as "oid"
+    from
+        pg_class t,
+        pg_class i,
+        pg_attribute a,
+        pg_index ix,
+        pg_namespace c
+    where
+        t.oid = ix.indrelid
+        and a.attnum = ANY(ix.indkey)
+        and a.attrelid = t.oid
+        and i.oid = ix.indexrelid
+        and t.relkind = 'r'
+        and ix.indisprimary = false
+        and t.relnamespace = c.oid
+        and c.nspname != 'pg_catalog'
+        and ('tables:' || c.nspname || '.' ||  t.relname) =OBJECT_ID_CONDITION
+    order by
+        t.relname
+`;

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

@@ -5,12 +5,8 @@ module.exports = `
         i.relname as "index_name",
         ix.indisprimary as "is_primary",
         ix.indisunique as "is_unique",
-        ( 
+        ix.indkey as "indkey",
-            select 
+        t.oid as "oid"
-                array_to_string(array_agg((select a.attname from pg_attribute a where ord = a.attnum and a.attrelid = t.oid)), '|')
-            from 
-            unnest(ix.indkey) ord
-        ) as "column_names"
     from
         pg_class t,
         pg_class i,