feat(embedded/sql): show databases/tables stmt

Signed-off-by: Jeronimo Irazabal <[email protected]>
codenotary · Oct 27, 2023 · 91a30ec · 91a30ec
1 parent 88c7377
commit 91a30ec
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Showing 3 changed files with 308 additions and 269 deletions.
diff --git a/embedded/sql/parser.go b/embedded/sql/parser.go
@@ -92,6 +92,9 @@ var reservedWords = map[string]int{
 	"IS":             IS,
 	"CAST":           CAST,
 	"::":             SCAST,
+	"SHOW":           SHOW,
+	"DATABASES":      DATABASES,
+	"TABLES":         TABLES,
 }
 
 var joinTypes = map[string]JoinType{

diff --git a/embedded/sql/sql_grammar.y b/embedded/sql/sql_grammar.y
@@ -75,6 +75,7 @@ func setResult(l yyLexer, stmts []SQLStmt) {
 %token SELECT DISTINCT FROM JOIN HAVING WHERE GROUP BY LIMIT OFFSET ORDER ASC DESC AS UNION ALL
 %token NOT LIKE IF EXISTS IN IS
 %token AUTO_INCREMENT NULL CAST SCAST
+%token SHOW DATABASES TABLES
 %token <id> NPARAM
 %token <pparam> PPARAM
 %token <joinType> JOINTYPE
@@ -523,6 +524,20 @@ dqlstmt:
             right: $4.(DataSource),
         }
     }
+|
+    SHOW DATABASES
+    {
+        $$ = &SelectStmt{
+            ds: &FnDataSourceStmt{fnCall: &FnCall{fn: "databases"}},
+        }
+    }
+|
+    SHOW TABLES
+    {
+        $$ = &SelectStmt{
+            ds: &FnDataSourceStmt{fnCall: &FnCall{fn: "tables"}},
+        }
+    }
 
 select_stmt: SELECT opt_distinct opt_selectors FROM ds opt_indexon opt_joins opt_where opt_groupby opt_having opt_orderby opt_limit opt_offset
     {