PGPRO-8546: Add core patch for REL_11_STABLE. Don't generate deforming jit code for tuples without user attributes. Without this patch an "ERROR: unknown alignment" may occur during jit compilation.

Tags: pg_pathman

Author: antamel

README.md

@@ -13,8 +13,8 @@ The `pg_pathman` module provides optimized partitioning mechanism and functions
 
 The extension is compatible with:
 
- * PostgreSQL 11, 12, 13;
- * PostgreSQL with core-patch: 14, 15;
+ * PostgreSQL 12, 13;
+ * PostgreSQL with core-patch: 11, 14, 15;
  * Postgres Pro Standard 11, 12, 13, 14, 15;
  * Postgres Pro Enterprise;
 

patches/REL_11_STABLE-pg_pathman-core.diff

@@ -0,0 +1,53 @@
+diff --git a/src/backend/jit/llvm/llvmjit_deform.c b/src/backend/jit/llvm/llvmjit_deform.c
+index 6384ac940d8..8b4f731e7a8 100644
+--- a/src/backend/jit/llvm/llvmjit_deform.c
++++ b/src/backend/jit/llvm/llvmjit_deform.c
+@@ -104,6 +104,10 @@ slot_compile_deform(LLVMJitContext *context, TupleDesc desc, int natts)
+ 
+ 	int			attnum;
+ 
++	/* don't generate code for tuples without user attributes */
++	if (desc->natts == 0)
++		return NULL;
++
+ 	mod = llvm_mutable_module(context);
+ 
+ 	funcname = llvm_expand_funcname(context, "deform");
+diff --git a/src/backend/jit/llvm/llvmjit_expr.c b/src/backend/jit/llvm/llvmjit_expr.c
+index 12138e49577..8638ebc4ba1 100644
+--- a/src/backend/jit/llvm/llvmjit_expr.c
++++ b/src/backend/jit/llvm/llvmjit_expr.c
+@@ -274,6 +274,7 @@ llvm_compile_expr(ExprState *state)
+ 					LLVMValueRef v_slot;
+ 					LLVMBasicBlockRef b_fetch;
+ 					LLVMValueRef v_nvalid;
++					LLVMValueRef l_jit_deform = NULL;
+ 
+ 					b_fetch = l_bb_before_v(opblocks[i + 1],
+ 											"op.%d.fetch", i);
+@@ -336,17 +337,20 @@ llvm_compile_expr(ExprState *state)
+ 					 */
+ 					if (desc && (context->base.flags & PGJIT_DEFORM))
+ 					{
+-						LLVMValueRef params[1];
+-						LLVMValueRef l_jit_deform;
+-
+ 						l_jit_deform =
+-							slot_compile_deform(context, desc,
++							slot_compile_deform(context,
++												desc,
+ 												op->d.fetch.last_var);
++					}
++
++					if (l_jit_deform)
++					{
++						LLVMValueRef params[1];
++
+ 						params[0] = v_slot;
+ 
+ 						LLVMBuildCall(b, l_jit_deform,
+ 									  params, lengthof(params), "");
+-
+ 					}
+ 					else
+ 					{