Merge pull request #2 from sgress454/sgress454/fleet-31222-update-escape-character-for-sqlite

fix: update escape character for sqlite

Author: sgress454

pegjs/sqlite.pegjs

@@ -2655,26 +2655,11 @@ single_quote_char
   / escape_char
 
 single_char
-  = [^'\\] // remove \0-\x1F\x7f pnCtrl char [^'\\\0-\x1F\x7f]
+  = [^'] // remove \0-\x1F\x7f pnCtrl char [^'\\\0-\x1F\x7f]
   / escape_char
 
 escape_char
-  = "\\'"  { return "\\'";  }
-  / '\\"'  { return '\\"';  }
-  / "\\\\" { return "\\\\"; }
-  / "\\/"  { return "\\/";  }
-  / "\\b"  { return "\b"; }
-  / "\\f"  { return "\f"; }
-  / "\\n"  { return "\n"; }
-  / "\\r"  { return "\r"; }
-  / "\\t"  { return "\t"; }
-  / "\\u" h1:hexDigit h2:hexDigit h3:hexDigit h4:hexDigit {
-      return String.fromCharCode(parseInt("0x" + h1 + h2 + h3 + h4));
-    }
-  / "\\" { return "\\"; }
-  / "''" { return "''" }
-  / '""' { return '""' }
-  / '``' { return '``' }
+  = "''"
 
 line_terminator
   = [\n\r]

test/sqlite.spec.js

@@ -266,8 +266,12 @@ describe('sqlite', () => {
     })
   })
   it('should support LIKE with ESCAPE', () => {
-    const sql = `SELECT * FROM table_name WHERE column_name LIKE '%pattern%' ESCAPE '\'`
-    expect(getParsedSql(sql)).to.be.equal(`SELECT * FROM "table_name" WHERE "column_name" LIKE '%pattern%' ESCAPE '\'`)
+    const sql = `SELECT * FROM table_name WHERE column_name LIKE '%pattern%' ESCAPE 'x'`
+    expect(getParsedSql(sql)).to.be.equal(`SELECT * FROM "table_name" WHERE "column_name" LIKE '%pattern%' ESCAPE 'x'`)
+  })
+  it('should allow single backslash without escaping', () => {
+    const sql = `SELECT * FROM table_name WHERE column_name LIKE '\\_%' ESCAPE '\\'`
+    expect(getParsedSql(sql)).to.be.equal(`SELECT * FROM "table_name" WHERE "column_name" LIKE '\\_%' ESCAPE '\\'`)
   })
   it('should support string concatenation in LIKE opts', () => {
     const sql = `SELECT * FROM file WHERE path LIKE 'C:' || CHAR(92) || 'Users' || CHAR(92) || 'example.txt'`