gudusoft.gsqlparser.sqlcmds

Class TSqlCmdsImpala

Object

gudusoft.gsqlparser.sqlcmds.AbstractSqlCmds

gudusoft.gsqlparser.sqlcmds.TSqlCmdsHive

gudusoft.gsqlparser.sqlcmds.TSqlCmdsImpala

All Implemented Interfaces:

ISqlCmds

public class TSqlCmdsImpala
extends TSqlCmdsHive

Impala SQL command resolver.

Impala historically shared TSqlCmdsHive; this subclass keeps the Hive command table but adds the Impala-only statements (COMPUTE STATS, DROP STATS, INVALIDATE METADATA, REFRESH, SHUTDOWN) so the statement splitter recognizes them instead of flagging the whole statement invalid. Statements without a dedicated grammar rule are routed through TUnknownSqlStatement carrying their specific statement type.

Field Summary

Fields inherited from class gudusoft.gsqlparser.sqlcmds.AbstractSqlCmds

initialized, initLock, sqlCmdList, vendor

Constructor Summary

Constructors

Constructor and Description
TSqlCmdsImpala()

Method Summary

Modifier and Type	Method and Description
protected void	initializeCommands() Initialize vendor-specific commands.
TCustomSqlStatement	issql(TSourceToken token, EFindSqlStateType state, TCustomSqlStatement currentStatement) Identifies the SQL statement type from a token stream.

Methods inherited from class gudusoft.gsqlparser.sqlcmds.TSqlCmdsHive

getToken1Str

Methods inherited from class gudusoft.gsqlparser.sqlcmds.AbstractSqlCmds

addCmd, addCmd, addCmd, addCmd, addCmd, addCmd, addCmd, addCmd, ensureInitialized, findcte, findCteByStructure, finddbcmd, getSqlCmdList, getStatementTypeForToken, getVendor, overrideCmd

Methods inherited from class Object

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

Constructor Detail

TSqlCmdsImpala

public TSqlCmdsImpala()

Method Detail

initializeCommands

protected void initializeCommands()

Description copied from class: AbstractSqlCmds

Initialize vendor-specific commands. Subclasses must implement this to populate sqlCmdList.

Overrides:

initializeCommands in class TSqlCmdsHive

issql

public TCustomSqlStatement issql(TSourceToken token,
                                 EFindSqlStateType state,
                                 TCustomSqlStatement currentStatement)

Description copied from interface: ISqlCmds

Identifies the SQL statement type from a token stream. This method is called repeatedly during parsing to identify statement boundaries and types in complex SQL scripts.

Specified by:

issql in interface ISqlCmds

Overrides:

issql in class TSqlCmdsHive

Parameters:

token - Current token being analyzed

state - Current parsing state (start, in body, or in exception)

currentStatement - Current statement being built (may be modified)

Returns:

The identified or modified SQL statement