Thomas Tauber-Marshall has uploaded a new patch set (#3). Change subject: IMPALA-4622: Add ALTER COLUMN statement. ......................................................................
IMPALA-4622: Add ALTER COLUMN statement. Kudu recently added the ability to alter a column's default value and storage attributes (KUDU-861). This patch adds the ability to modify these from Impala using ALTER. It also supports altering a column's comment for non-Kudu tables. It does not support setting a column to be a primary key or chaning a column's nullability, because those are not supported on the Kudu side yet. Syntax: ALTER TABLE <table> ALTER [COLUMN] <column> SET <attr> <value> [<attr> <value> [<attr> <value>...]] where <attr> is one of: - DEFAULT, BLOCK_SIZE, ENCODING, COMPRESSION (Kudu tables) - COMMENT (non-Kudu tables) ALTER TABLE <table> ALTER [COLUMN] <column> DROP DEFAULT This is similar to the existing CHANGE statement: ALTER TABLE <table> CHANGE <column> <new_col_name> <type> [COMMENT <comment>] but the new syntax is more natural for setting column properties when the column name and type are not being changed. ALTER COLUMN operations are sent to the catalog as CHANGE operations where the type and column name are unchanged. Testing: - Added FE tests to ParserTest and AnalyzeDDLTest - Added EE tests to kudu_alter.test and kudu_describe.test Change-Id: Id2e8bd65342b79644a0fdcd925e6f17797e89ad6 --- M fe/src/main/cup/sql-parser.cup A fe/src/main/java/org/apache/impala/analysis/AlterColumnStmt.java M fe/src/main/java/org/apache/impala/analysis/ColumnDef.java M fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java M fe/src/main/java/org/apache/impala/service/KuduCatalogOpExecutor.java M fe/src/test/java/org/apache/impala/analysis/AnalyzeDDLTest.java M fe/src/test/java/org/apache/impala/analysis/ParserTest.java M testdata/workloads/functional-query/queries/QueryTest/alter-table.test M testdata/workloads/functional-query/queries/QueryTest/kudu_alter.test M testdata/workloads/functional-query/queries/QueryTest/kudu_describe.test 10 files changed, 256 insertions(+), 11 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/55/6955/3 -- To view, visit http://gerrit.cloudera.org:8080/6955 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: newpatchset Gerrit-Change-Id: Id2e8bd65342b79644a0fdcd925e6f17797e89ad6 Gerrit-PatchSet: 3 Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-Owner: Thomas Tauber-Marshall <[email protected]> Gerrit-Reviewer: Matthew Jacobs <[email protected]> Gerrit-Reviewer: Thomas Tauber-Marshall <[email protected]>
