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Support ifnull fe builtin function (#2292) (#2327)

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Seaven
2019-11-28 22:10:08 +08:00
committed by ZHAO Chun
parent 324f1b8f51
commit 814e486113
1 changed files with 26 additions and 0 deletions
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26
fe/src/main/java/org/apache/doris/rewrite/FEFunctions.java Normal file → Executable file
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@ -23,6 +23,7 @@ import org.apache.doris.analysis.FloatLiteral;
import org.apache.doris.analysis.IntLiteral;
import org.apache.doris.analysis.LargeIntLiteral;
import org.apache.doris.analysis.LiteralExpr;
import org.apache.doris.analysis.NullLiteral;
import org.apache.doris.analysis.StringLiteral;
import org.apache.doris.catalog.Type;
import org.apache.doris.common.AnalysisException;
@ -402,4 +403,29 @@ public class FEFunctions {
resultBuilder.append(values[values.length - 1].getStringValue());
return new StringLiteral(resultBuilder.toString());
}
@FEFunction(name = "ifnull", argTypes = {"VARCHAR", "VARCHAR"}, returnType = "VARCHAR")
public static LiteralExpr ifNullString(LiteralExpr first, LiteralExpr second) throws AnalysisException {
return first instanceof NullLiteral ? second : first;
}
@FEFunction(name = "ifnull", argTypes = {"TINYINT", "TINYINT"}, returnType = "TINYINT")
public static LiteralExpr ifNullTinyInt(LiteralExpr first, LiteralExpr second) throws AnalysisException {
return first instanceof NullLiteral ? second : first;
}
@FEFunction(name = "ifnull", argTypes = {"INT", "INT"}, returnType = "INT")
public static LiteralExpr ifNullInt(LiteralExpr first, LiteralExpr second) throws AnalysisException {
return first instanceof NullLiteral ? second : first;
}
@FEFunction(name = "ifnull", argTypes = {"BIGINT", "BIGINT"}, returnType = "BIGINT")
public static LiteralExpr ifNullBigInt(LiteralExpr first, LiteralExpr second) throws AnalysisException {
return first instanceof NullLiteral ? second : first;
}
@FEFunction(name = "ifnull", argTypes = { "DATETIME", "DATETIME" }, returnType = "DATETIME")
public static LiteralExpr ifNullDateTime(LiteralExpr first, LiteralExpr second) throws AnalysisException {
return first instanceof NullLiteral ? second : first;
}
}