Package org.apache.flink.table.functions

Interface SqlCallSyntax

@Internal public interface SqlCallSyntax
Provides a format for unparsing BuiltInFunctionDefinitions into a SQL string.

  • Field Details

    • FUNCTION

      static final SqlCallSyntax FUNCTION
      Function syntax, as in "Foo(x, y)".

    • NO_PARENTHESIS

      static final SqlCallSyntax NO_PARENTHESIS
      Function syntax for functions without parenthesis (e.g., CURRENT_DATE, LOCALTIMESTAMP, LOCALTIME, CURRENT_TIMESTAMP, CURRENT_TIME).

    • DISTINCT

      static final SqlCallSyntax DISTINCT
      Function syntax for handling DISTINCT aggregates. Special case. It does not have a syntax itself, but modifies the syntax of the nested call.

    • COLLECTION_CTOR

      static final SqlCallSyntax COLLECTION_CTOR
      Function syntax for collection ctors, such as ARRAY[1, 2, 3] or MAP['a', 1, 'b', 2].

    • BINARY_OP

      static final SqlCallSyntax BINARY_OP
      Binary operator syntax, as in "x - y".

    • PLUS_OP

      static final SqlCallSyntax PLUS_OP
      Syntax for unparsing '+', Special handling for a plus on string arguments.

    • MULTIPLE_BINARY_OP

      static final SqlCallSyntax MULTIPLE_BINARY_OP
      Binary operator syntax that in Table API can accept multiple operands, as in "x AND y AND t AND w".

    • UNARY_SUFFIX_OP

      static final SqlCallSyntax UNARY_SUFFIX_OP
      Postfix unary operator syntax, as in "x ++".

    • UNARY_PREFIX_OP

      static final SqlCallSyntax UNARY_PREFIX_OP
      Prefix unary operator syntax, as in "- x".

    • CAST

      static final SqlCallSyntax CAST
      Special sql syntax for CAST operators (CAST, TRY_CAST, REINTERPRET_CAST).

      Example: CAST(123 AS STRING)

    • SUBSTRING

      static final SqlCallSyntax SUBSTRING
      Special sql syntax for SUBSTRING operators (SUBSTRING, SUBSTR).

      Example: SUBSTR('abc' FROM 'abcdef' FOR 3)

    • FLOOR_OR_CEIL

      static final SqlCallSyntax FLOOR_OR_CEIL
      Special sql syntax for FLOOR and CEIL.

      Examples:

      • FLOOR(TIME ‘12:44:31’ TO MINUTE)
      • FLOOR(123)

    • TRIM

      static final SqlCallSyntax TRIM
      Special sql syntax for TRIM.

      Example: TRIM(BOTH ' ' FROM ' 0 ');

    • OVERLAY

      static final SqlCallSyntax OVERLAY
      Special sql syntax for OVERLAY.

      Example: OVERLAY('abcd' PLACING 'def' FROM 3 FOR 2)

    • AS

      static final SqlCallSyntax AS
      Special sql syntax for AS. The string literal is formatted as an identifier.

    • IN

      static final SqlCallSyntax IN
      Call syntax for BuiltInFunctionDefinitions.IN.

    • WINDOW_START_END

      static final SqlCallSyntax WINDOW_START_END

    • LIKE

      static final SqlCallSyntax LIKE
      Special sql syntax for LIKE.

      Example: 'TE_ST' LIKE '%E&_S%' ESCAPE '&';

    • OVER

      static final SqlCallSyntax OVER

  • Method Details