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MXS-2250 Reveal table information for 'DESCRIBE tbl'

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When a statement like 'DESCRIBE tbl' is classified, the table
name will now be available so that a router can check whether the
table is a temporary one. In that case, the statement must be sent
to the master.
This commit is contained in:
Johan Wikman
2019-06-04 16:51:53 +03:00
parent c219187a1e
commit b8d601aab2
6 changed files with 93 additions and 57 deletions
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29
query_classifier/qc_sqlite/sqlite-src-3110100/src/parse.y
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@ -117,7 +117,8 @@ extern void maxscaleDo(Parse*, ExprList* pEList);
extern void maxscaleDrop(Parse*, int what, Token* pDatabase, Token* pName);
extern void maxscaleExecute(Parse*, Token* pName, int type_mask);
extern void maxscaleExecuteImmediate(Parse*, Token* pName, ExprSpan* pExprSpan, int type_mask);
extern void maxscaleExplain(Parse*, Token* pNext);
extern void maxscaleExplainTable(Parse*, SrcList* pList);
extern void maxscaleExplain(Parse*);
extern void maxscaleFlush(Parse*, Token* pWhat);
extern void maxscaleHandler(Parse*, mxs_handler_t, SrcList* pFullName, Token* pName);
extern void maxscaleLoadData(Parse*, SrcList* pFullName, int local);
@ -302,13 +303,16 @@ ecmd ::= oracle_assignment SEMI.
explain_kw ::= EXPLAIN. // Also covers DESCRIBE
explain_kw ::= DESC.
explain ::= explain_kw. { pParse->explain = 1; }
explain ::= explain_kw tbl_name(A). { pParse->explain = 1; maxscaleExplainTable(pParse, A); }
explain_type ::= .
explain_type ::= EXTENDED.
explain_type ::= PARTITIONS.
// deferred_id is defined later, after the id token_class has been defined.
explain ::= explain_kw deferred_id(A). { maxscaleExplain(pParse, &A); }
explain ::= explain_kw deferred_id(A) DOT deferred_id. { maxscaleExplain(pParse, &A); }
ecmd ::= explain FOR(A) deferred_id INTEGER SEMI. { // FOR CONNECTION connection_id
explain_type ::= FORMAT TK_EQ deferred_id. // FORMAT = {TRADITIONAL|JSON}
explain ::= explain_kw explain_type FOR CONNECTION INTEGER. { // FOR CONNECTION connection_id
pParse->explain = 1;
maxscaleExplain(pParse, &A);
maxscaleExplain(pParse);
}
%endif
%ifndef SQLITE_OMIT_EXPLAIN
@ -614,10 +618,10 @@ columnid(A) ::= nm(X). {
// TODO: BINARY is a reserved word and should not automatically convert into an identifer.
// TODO: However, if not here then rules such as CAST need to be modified.
BINARY
/*CASCADE*/ CAST CLOSE COLUMNKW COLUMNS COMMENT CONCURRENT /*CONFLICT*/
/*CASCADE*/ CAST CLOSE COLUMNKW COLUMNS COMMENT CONCURRENT /*CONFLICT*/ CONNECTION
DATA DATABASE DEALLOCATE DEFERRED /*DESC*/ /*DETACH*/ DUMPFILE
/*EACH*/ END ENGINE ENUM EXCLUSIVE /*EXPLAIN*/
FIRST FLUSH /*FOR*/ FORMAT
/*EACH*/ END ENGINE ENUM EXCLUSIVE /*EXPLAIN*/ EXTENDED
FIELDS FIRST FLUSH /*FOR*/ FORMAT
GLOBAL
// TODO: IF is a reserved word and should not automatically convert into an identifer.
IF IMMEDIATE INITIALLY INSTEAD
@ -627,7 +631,7 @@ columnid(A) ::= nm(X). {
NAMES NEXT
NO
OF OFFSET OPEN
PREVIOUS
PARTITIONS PREVIOUS
QUICK
RAISE RECURSIVE /*REINDEX*/ RELEASE /*RENAME*/ /*REPLACE*/ RESTRICT ROLLBACK ROLLUP ROW
SAVEPOINT SELECT_OPTIONS_KW /*SEQUENCE*/ SLAVE /*START*/ STATEMENT STATUS
@ -3241,7 +3245,10 @@ like_or_where_opt ::= WHERE expr.
%type show {MxsShow}
show(A) ::= SHOW full_opt(X) COLUMNS from_or_in nm(Y) dbnm(Z) from_or_in_db_opt(W) like_or_where_opt . {
columns_or_fields ::= COLUMNS.
columns_or_fields ::= FIELDS.
show(A) ::= SHOW full_opt(X) columns_or_fields from_or_in nm(Y) dbnm(Z) from_or_in_db_opt(W) like_or_where_opt . {
A.what = MXS_SHOW_COLUMNS;
A.data = X;
if (Z.z) {