6faf0b3baa
In order to re-calculate min/max values for groups where the min or max value is deleted, we need the view query definition in string form. However, pg_get_viewdef cannot be used for this purpose because IMMV's defenition is in pg_ivm_immv but not pg_rewrite. Therefore, we have to convert query definition in pg_ivm_immv to query definition string. We can use pg_get_querydef in PG15, but we cannot in PG14 or earlier, so we use codes in ruleutil.c copied from PG13 or PG14 depending versions.
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* ruleutils.c
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* incremental view maintenance extension
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* Routines for convert stored expressions/querytrees back to
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* source text
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*
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* Portions Copyright (c) 2022, IVM Development Group
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* Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#if defined(PG_VERSION_NUM) && (PG_VERSION_NUM >= 150000)
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#include "utils/ruleutils.h"
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#elif defined(PG_VERSION_NUM) && (PG_VERSION_NUM >= 140000)
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#include "ruleutils_14.c"
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#else
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#include "ruleutils_13.c"
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#endif
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#include "pg_ivm.h"
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/* Standard conversion of a "bool pretty" option to detailed flags */
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#define GET_PRETTY_FLAGS(pretty) \
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((pretty) ? (PRETTYFLAG_PAREN | PRETTYFLAG_INDENT | PRETTYFLAG_SCHEMA) \
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: PRETTYFLAG_INDENT)
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/* ----------
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* pg_get_querydef
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*
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* Public entry point to deparse one query parsetree.
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* The pretty flags are determined by GET_PRETTY_FLAGS(pretty).
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*
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* The result is a palloc'd C string.
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* ----------
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*/
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char *
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pg_ivm_get_querydef(Query *query, bool pretty)
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{
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#if defined(PG_VERSION_NUM) && (PG_VERSION_NUM >= 150000)
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return pg_get_querydef(query, pretty);
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#else
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StringInfoData buf;
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int prettyFlags;
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prettyFlags = GET_PRETTY_FLAGS(pretty);
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initStringInfo(&buf);
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get_query_def(query, &buf, NIL, NULL, true,
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prettyFlags, WRAP_COLUMN_DEFAULT, 0);
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return buf.data;
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#endif
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}
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