From 4bcf91fd03fc7e7babdb49d981e4310b233ee3c1 Mon Sep 17 00:00:00 2001
From: Pranav C <pranavxc@gmail.com>
Date: Wed, 22 Nov 2023 07:17:55 +0000
Subject: [PATCH] fix: REGEX_EXTRACT - formula function correction

---
 packages/nc-gui/utils/formulaUtils.ts         | 2 +-
 packages/nocodb/src/db/functionMappings/pg.ts | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/nc-gui/utils/formulaUtils.ts b/packages/nc-gui/utils/formulaUtils.ts
index aac7611cf9..abe03d1d19 100644
--- a/packages/nc-gui/utils/formulaUtils.ts
+++ b/packages/nc-gui/utils/formulaUtils.ts
@@ -482,7 +482,7 @@ const formulas: Record<string, any> = {
         rqd: 0,
       },
     },
-    description: 'Returns an empty string.',
+    description: 'Returns a blank value.',
     syntax: 'BLANK()',
     examples: ['BLANK()'],
   },
diff --git a/packages/nocodb/src/db/functionMappings/pg.ts b/packages/nocodb/src/db/functionMappings/pg.ts
index 427454d13b..2105f19dcf 100644
--- a/packages/nocodb/src/db/functionMappings/pg.ts
+++ b/packages/nocodb/src/db/functionMappings/pg.ts
@@ -201,7 +201,9 @@ const pg = {
     const pattern = (await fn(pt.arguments[1])).builder;
     return {
       builder: knex.raw(
-        `REGEXP_MATCHES(${source}::text, ${pattern}::text) ${colAlias}`,
+        // use `SUBSTRING` since REGEXP_MATCH returns array value
+        // `REGEXP_MATCH(${source}::text, ${pattern}::text) ${colAlias}`,
+        `SUBSTRING(${source}::text from ${pattern}::text) ${colAlias}`,
       ),
     };
   },