Package dev.frostlake.executor.commands

Class DataTypeParser

java.lang.Object

dev.frostlake.executor.commands.DataTypeParser

public final class DataTypeParser
extends Object

The one dataTypeName parse-tree → DataType mapping, shared by column / parameter definitions (ColumnDefinitionParser) and by expression casts (the expression AST builder), so a type spelled in a CREATE TABLE and the same type spelled in a CAST produce the same object.

It reads the STRUCTURED spellings — OBJECT(x VARCHAR, ...), ARRAY(INT), MAP(k, v) — into StructuredObjectType / StructuredArrayType / MapType rather than collapsing them onto the plain semi-structured singletons, because Snowflake treats structured and plain semi-structured types as DIFFERENT types.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	CAST_STRING_DEFAULT	The default length of a bare VARCHAR inside a CAST TARGET.

Method Summary

Modifier and Type	Method	Description
static DataType	parse(FrostlakeParser.DataTypeNameContext ctx, FrostlakeParser.TypeParametersContext typeParams)
static DataType	parse(FrostlakeParser.DataTypeNameContext ctx, FrostlakeParser.TypeParametersContext typeParams, int bareStringDefault)	parse(dev.frostlake.parser.FrostlakeParser.DataTypeNameContext, dev.frostlake.parser.FrostlakeParser.TypeParametersContext) with the bare-VARCHAR default the CONTEXT implies — CAST_STRING_DEFAULT for a cast target, DDL_STRING_DEFAULT for a column definition.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

CAST_STRING_DEFAULT

public static final int CAST_STRING_DEFAULT

The default length of a bare VARCHAR inside a CAST TARGET. Live renders a cast-produced structured type with the LONGER conversion default — ARRAY_AGG(CAST(... AS OBJECT(x VARCHAR))) is refused as "(OBJECT(x VARCHAR(134217728)))" where the same type DECLARED on a column reports VARCHAR(16777216).

See Also:

• Constant Field Values

Method Details

parse

public static DataType parse(FrostlakeParser.DataTypeNameContext ctx,
 FrostlakeParser.TypeParametersContext typeParams)

parse

public static DataType parse(FrostlakeParser.DataTypeNameContext ctx,
 FrostlakeParser.TypeParametersContext typeParams,
 int bareStringDefault)

parse(dev.frostlake.parser.FrostlakeParser.DataTypeNameContext, dev.frostlake.parser.FrostlakeParser.TypeParametersContext) with the bare-VARCHAR default the CONTEXT implies — CAST_STRING_DEFAULT for a cast target, DDL_STRING_DEFAULT for a column definition.