diff options
Diffstat (limited to 'sqlglot/dialects/mysql.py')
| -rw-r--r-- | sqlglot/dialects/mysql.py | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/sqlglot/dialects/mysql.py b/sqlglot/dialects/mysql.py index e4de934..5d65f77 100644 --- a/sqlglot/dialects/mysql.py +++ b/sqlglot/dialects/mysql.py @@ -427,6 +427,7 @@ class MySQL(Dialect): TABLE_HINTS = True DUPLICATE_KEY_UPDATE_WITH_SET = False QUERY_HINT_SEP = " " + VALUES_AS_TABLE = False TRANSFORMS = { **generator.Generator.TRANSFORMS, @@ -473,19 +474,32 @@ class MySQL(Dialect): LIMIT_FETCH = "LIMIT" + # MySQL doesn't support many datatypes in cast. + # https://dev.mysql.com/doc/refman/8.0/en/cast-functions.html#function_cast + CAST_MAPPING = { + exp.DataType.Type.BIGINT: "SIGNED", + exp.DataType.Type.BOOLEAN: "SIGNED", + exp.DataType.Type.INT: "SIGNED", + exp.DataType.Type.TEXT: "CHAR", + exp.DataType.Type.UBIGINT: "UNSIGNED", + exp.DataType.Type.VARCHAR: "CHAR", + } + + def xor_sql(self, expression: exp.Xor) -> str: + if expression.expressions: + return self.expressions(expression, sep=" XOR ") + return super().xor_sql(expression) + def jsonarraycontains_sql(self, expression: exp.JSONArrayContains) -> str: return f"{self.sql(expression, 'this')} MEMBER OF({self.sql(expression, 'expression')})" def cast_sql(self, expression: exp.Cast, safe_prefix: t.Optional[str] = None) -> str: - """(U)BIGINT is not allowed in a CAST expression, so we use (UN)SIGNED instead.""" - if expression.to.this == exp.DataType.Type.BIGINT: - to = "SIGNED" - elif expression.to.this == exp.DataType.Type.UBIGINT: - to = "UNSIGNED" - else: - return super().cast_sql(expression) + to = self.CAST_MAPPING.get(expression.to.this) - return f"CAST({self.sql(expression, 'this')} AS {to})" + if to: + expression = expression.copy() + expression.to.set("this", to) + return super().cast_sql(expression) def show_sql(self, expression: exp.Show) -> str: this = f" {expression.name}" |